From: http://forums.ageofconan.com/showthread.php?t=363

Server list Early Access (revamped)

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As we added a new PvP Ruleset (Culture PvP) we had to tweak the different numbers of servers and also names a little bit. So the new list now is as follows:


US Servers (Early Access 17th of May)

PvE Servers
• Set
• Dagoth
• Zug
• Omm
• Derketo
• Thog
• Wiccana
• Gwahlur (recommended Oceanic)

PvP Servers
• Tyranny
• Bane (Culture PvP)
• Deathwisper
• Bloodspire (recommended Oceanic)
• Doomsayer
• Stormrage

RP-PvP Server
• Cimmeria (RP)


And we will of course add mores servers for launch. Details to follow soon.

I'm not sure if anything actually changed, other than the "• Bane (Culture PvP)" part.

Edit: It appears there is a new Culture ruleset going in for one of these servers. AKA - Race vs Race.
From: http://forums.ageofconan.com/showthread.php?t=4

New PvP Ruleset: Culture PvP

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As part of celebrating the release of Age of Conan we are happy to unravel a brand new PvP ruleset that has not previously been disclosed: The Culture PvP ruleset! Note that this new PvP server type is experimental and players on these servers must expect an ongoing change to the ruleset.

The goal of this PvP server-type is to stimulate war behind the three cultures of Cimmeria, Aquilonia and Stygia. As a player on a Culture PvP server, you are shielded from lone travelers of your own culture, however you may still group with any culture and form a group and attack anyone.

The Culture PvP ruleset is an evolving ruleset that will be tweaked and polished based on player-feedback in the months to come. Although it is, at least currently, possible to make guilds across cultures, pure culture groups and guilds will be endorsed on this server, and as such players on the Culture PvP servers must prepare that the future will hold continued changes to the ruleset.

We have changed to ruleset on two servers that were previously flagged as full PvP. The homes for the Culture PvP servers are:


Bane (US)
Twilight (EU)

With best regards,

Funcom

Note - the Twilight realm doesn't appear on the list above. Odd.