Thanks to TheHawk for pointing out a video interview with Obsidian PR Producer, Matthew Rorie on GameTrailers.com all about the upcoming NWN2: Storm of Zehir expansion pack. The video features Matthew talking about the expansion and showing some footage including the new overland map system. I actually got to see a very early prototype of it during one of my trips to Obsidian and it's really cool. It's great to see that it'll now be available to all modders to include.
Also during the video Matthew talks about the main new feature of the expansion where players will be able to create up to 4 characters for their party to control. So this a major step up from the companion system and you will be able to create whatever classes you want. He also explains that Zehir is a 4th edition D&D God even though the ruleset is still 3.5. Zehir is a the God of darkness, poison, snakes, who are worshipped by the Yuan-Ti, and are your main enemy.
The official campaign of the expansion will have you go from level 3 to 15 and the expansion should be out Q4 of this year. Definitely a great video to watch and you can also check out this thread on the official forums for more reactions.
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone