I did chuckle at the second devs ignorance when talking about the smuggler's cover system being the first ever in an mmo.
Granted, TOR is adding in the PC but that is dubious leap given the less than impressive system that was evident in Mass Effect. KOTOR and Jade Empire played better without the PC's role voice acted.
Oh, what classes? Well, there are 8 total and we've seen 4. Sith's mirror is obviously Jedi. Smuggler, if not mirrored by Bounty Hunter (Don't think it is) would be Pirate (Mara Jade, Karrd and the like). Bounty Hunter would be some sort of law officer. What would then be left would be some sort of healer analog for either side and/or droids of some sort? Not thinking solely in terms of Star Wars since SW is just an amalgamation of the classical archetypes. They can choose any of those then find a SW analogue to fit as needed.