As I looked to reply to this I tested an old account and, lo and behold, it still works. An account I created back in 2004.
I've been a fan of Obsidian for quite a long time and would love to see you guys given the freedom to create without answering to a publisher.
I won't give specific suggestions as I'm sure everyone at Obsidian has a game idea they'd like to see made and you certainly know best what your resources are. However, as others have written, it has been a long time since we've seen a nice turn based iso rpg and I think I would enjoy that very much.
Good luck