Well, Neverwinter Nights is next on the list. That should be around in spring 2003. After that, it's all pretty vague. I
know there aren't going to be any more additions to the Baldur's Gate trilogy. As for Icewind Dale II, that might happen, though I doubt it. Best to check their websites for news about releases and that kind of thing.
http://www.blackisle.com/
http://www.bioware.com/