I've been keeping track of all announced things about the game. Most of the things on this list are relatively small things but if you are interested more info can be found here.
How are those expansios integrated in the main game? BG1 style where you can just do it whenever you want, or more in classic order, with main game, afterwards expansions 1, then expansion 2?
Like in the original Icewind Dale, you can either do HoW + TotL in the course of the main game (like TotSC in BG1) or as a standalone HoW + TotL adventure. You actually can't do them one after the other because HoW is only accessible in the middle of the main game (or standalone) and TotL is only accessible within HoW.
Comments
I've been keeping track of all announced things about the game. Most of the things on this list are relatively small things but if you are interested more info can be found here.
http://forum.baldursgate.com/discussion/comment/542662/#Comment_542662