dtgreene: Also, note that I never claimed it's useful in IWD2.
IwubCheeze: Notice the thread title? The OP is specifically asking about the USEFULNESS of druids as a CLASS in IWD2. You go ahead and post about the exploit that you've beaten to death in the BG forum and then you make NO CLAIMS to its USEFULNESS in IWD2. Just think about that for a minute.
Here is an argument for this:
Wild Shape is useful, in part, because it allows polymorph teleporting.
Whether polymorph teleporting is useful is not the question here. The fact is, if you want to have any chance of playing around with this trick in this game, you need a Druid.
Also, Wild Shape may have other uses (like being good in combat) that are not related to polymorph teleporting.
By the way, can the natural weapons of Wild Shape forms be dispelled in this game? (I actually had this happen by accident in IWD1.)
Edit: I should also point out that I didn't bring up polymorph teleporting until later in the thread, after some answers had already been given, and I did indeed have a post earlier in the thread about a multiclass combo some players find useful.