If you check the prefabs area of the NWVault: http://nwvault.ign.com/View.php?view=nwn2p...ow_days_back=10
Open the left scroll-menu, and select Obsidian area contest. Then you'll see the areas submitted.
I've actually been inspired to start doing stuff in the toolset, trying to create an area instead of just farting around and then discarding it. While it's taking its sweet time figuring out how everything works (in terms of the visuals) and what doesn't work, it's really quite fun. Still, I'm just in awe of people like the author of Harp & Crysanthemum. I just cannot believe how good looking the areas in that module is, it's truly incredibly.
But yeah, I encourage everyone who hasn't done so to play around a bit with the NWN2 toolset. It's pretty fun, and maybe you'll get hooked enough on it to eventually release content of your own to the vault.
I recommend these two tutorials.
http://nwvault.ign.com/View.php?view=NWN2T...etail&id=14
http://nwvault.ign.com/View.php?view=NWN2T...etail&id=41
The first one is great for just starting out, and seeing how the layout works in general. The second tutorial actually incorporates some of the content from the first one, but goes slightly more in-depth.
Also, a few parts of them are outdated (I think there has been some changes to the toolset with the patches), but still very much worth it and an incredible help for someone starting out.