I found most of these tips in the TeamWarfare.com forums. Rogue there found it somewhere else and started a hints and tips thread.

Advance & Secure

- Never leave your bases undefended. Take up a grenade launcher and have fun! Unlimited ammo and can fire fairly rapidly. Really good at base defense and can fire as far as the eye can see. - Briguy992

- The jeeps with machine guns can be taken onto hills for air defense. A couple mobile machine guns, as jeeps are, on the side of hills against a helicopter and the odds are in your favor to beat that copter.. - tiwaz-MW-

- While guarding your own base - don't get too comfy at an openly emplaced weapon - especially if you failed to demolish a chopper that ducks behind a hill - and it doesn't reappear..chances are they are creeping in for a sniper kill. - EyeInStein

- Here?s one for all Pilots. If you?re taking fire fly into the sun putting yourself between your enemy and the sun. I find that the sun glare is very effective in escape and evading trouble. Or attack the opposing forces base coming from the direction of the sun. - Gunny-TNT

- Ground/Water vehicals work better for attacking and taking over a base 90% of the time over using a helicopter. - Wall-BMF

- After you take over a base stick around, hop on a mounted gun and play some heavy defense for 5 mins or so. The easiest kills come from defending with mounted guns. - Wall-BMF

- Remember #'s in the base circle mean a lot! If you find yourself in an enemy base outnumberd 10 to 1 with enemy defenders on .50 cals and APC's, just lay low and hideout in the circle area. Let them try to find you. You can get a lot of kills just hidding in the enemy base circle and waiting for them to cross your path. Also staying alive and not killing anyone can at times be more valuable then killing 3 enemy's and dieing. (this is not TDM, they can spawn back in and you want #'s in their circle!!) - Wall-BMF

- If you are driving a vehicle and you have passengers, especially someone on the 50, do not charge into the base, stop, and bail out.. Move to the outer parameter of the base, outside the sand bags in Kombang, and circle the base a few times to let the 50 gunner spray the camp. Then you want to spiral inside the parameter and circle the bunker a few times so the gunner can clear the inside of the bunker. - tiwaz-MW-

Vehicles

- You can change the vehicle speed using Z, X, and C buttons. Z being low gear, X is Mid Gear, and C is High Gear. - Sphire

- You can disable mouse steering while driving by holding down the right-mouse button. Use it to look around - Sphire

- When flying a helicopter, you can orbit a target by holding down W and A or D. This will also turn mouse steering off so that you can look down at the target you are orbiting. This allows the gunners to get a solid platform to fire from. - I like tacos

- While you're in a vehicle you can use Shift key + the Seat # to quickly change positions within the vehicle. Works great for quickly changing gunner positions or from going from driver to gunner... - schu

- Press "E" to raise altitude and "Q" to lower altitude in a helicopter - tiwaz-MW-

- There is a little dark grey 'X' in front of the copters that can shoot. You have to line that up to your target. The weapons on the helos are fixed so at whatever angle the nose is pointing is where you will fire towards. - tiwaz-MW-

- Low flying choppers don't seem as easy to spot. - EyeInStein

- Stop your transport outside an encampment - giving your passengers some time to get off, oriented and in position of their own chosing. - EyeInStein

- If you don't want to hold down those orbit keys, you can fly free hand w/ mouse by just watching your gps and stay just outside the zone ring of the opfors base. Also, make sure you check the layout of your crew in the chopper. Flying circles around a base is useless if the gunner is on the opposite gun. - Eclipse-EVOL

Weapons

-If you choose the engineer slot with a mortar for your weapon team with another player who can be your laser sighter, seems a few people were laser pointers yesterday, but no mortar men near them to provide the attack. This looks like it could be a nice addition to the player options if players work together and perform their attacks as a team... - KillroyV

- How to use the mortar: To use the mortars with the designator. You have to have one brave person go and designate a target. After a target is designated another person can be as far as about 450m from the target and fire rounds. As an engineer you have mortars selected and then right click your mouse like you are bringing up a scope, this will drop you to a knee and bring up a range in the middle of your screen. You then press M and this will bring up a small map which you can use to aim where you want your mortars to go. Once the person designates a target everyone will see that spot on their map. As the engineer you then make sure you are within the distance of that target and use your mouse to move the aiming circle over the designated area and fire away.

- I dont know if this is much of a tactical thing, but I load up a hummer in the back of a loader heli and I use the 50cal like a tail gunner... Fun Stuff. - Teller

- Use your claymores.... If you are the only one defending a base, drop a claymore at both entrances of the bunker... Someone is bound to try to get in at some point... After dropping your claymores, don't forget to rearm yourself with a new batch from the armory... - schu

User Interface

- Hit B for binoculars, they work pretty well, even on a chopper. - sphire

- Pressing "U" will show all of the recent conversation. - sphire

- Voice commands are initiated using the F9 and F10 keys, for commands that use the number "10" just hit 0. - sphire

- Hitting Tab during gameplay will display the players list with all the players (it's equal to hitting K on BHD). - DN-Viper

General Gameplay

- During games hosted by other players, you may be able to change teams
in mid-game. This depends on whether the game is hosted with this option.
To do change teams, press the ~ key (without pressing the SHIFT key)
to open the command line. Enter "server changeteam" (without the quotes).
Apparently, it's not enabled in the demo. I get a message that the server cannot allow it.

-For those of you experiencing problems with TK'ing:

Vote punting is available in the demo. Simply make sure it's turned on (it's off by default) by finding the following line in the game.cfg file:

mpvoting = 0

change the '0' to a '1'. The next two lines:

mpvoting_min_players = 2

mpvoting_percent = 0.500000

can be modified to set the minimum number of players required in the server before punting is available. And the percentage of vote required (out of all players) before a punt can occur. Note that 0.5 is fifty percent.

There is no time limit on voting. You can vote at any time. You vote by accessing the Commanders Menu ('V') and selecting the player tab. Find the column labeled 'punt' and place a check mark in the check box if you want that person to be punted. Note that you can only place one vote, but you may change it at any time.

Next time that pesky TK'er starts causing problems, send him on his way! - Mr. French