Dungeons And Dragons Online: Release Notes Module 3: The Demon Sands

Samera has posted the full release notes on the official forums:

The Demon Sands

The sprawling dunes of Menechtarun hide deadly secrets and are home to powerful new enemies. Beware - despite these new monsters your most dangerous enemy might now be another adventurer....

• Battle other players in tavern free-for-all brawls, compete to Capture the Flag, or fight team vs. team and player vs. player in Death Matches with the new PVP system.
• Learn amazing new spells, enhancements, and feats with the level cap increase to Level 12 (Rank 60).
• A new desert adventure with a massive landscape and 12 new high level dungeons.
• Visit the Auction House to buy and sell the magical treasures of Xen'drik with other players.
• Enjoy new favor rewards.
• Trade feats you no longer want with the new Feat Respec System.
• Benefit from improvements to the shop interface and treasure system.

Level Cap Increase to Level 12

Head over to the official forums for the rest of the long list of changes.