I've almost finished Icewind Dale, and am thinking of getting the expansion pack..is it out yet?

I've just done a search on google and it looks like a version has been released. Don't know where you are based but perhaps try:

http://www.epinions.com (do a search in the games section)
http://www.macmall.com
and even http://www.amazon.com

plus there are always copies showing up on ebay.com

I found it hard to get a copy for the PC in the UK, but I've eventually got one and its worth it for the improvement in resolution alone.

Good luck