Bornakk has sent out a request on the forums for player questions to be used in the next BlizzCast, and I can only say that I hope, hope, hope that that delivers as much comedy as it promises. As you may know if you attended any of the Q&A sessions at BlizzCon, players and their questions plus developers equals the funny.
Considering that the podcasts are pre-recorded and not live, however, so odds are Blizzard will go for informative rather than confusing and awkward, but let me tell you: the latter has its advantages for sure. If you've got a question for BlizzCast, you can apparently send it to BlizzCast (at) Blizzard dot com, and hope it appears on a future BlizzCast.
And speaking of podcast questions, don't forget that the WoW Insider Show is also a podcast that answers questions, and you can ask us questions at firstname.lastname@example.org. Unlike Blizzard, we will include the funny ones, so send away.