A friend asked me today "With all your word knowledge and connections, can you solve a problem I've been chewing over for quite a while? What is the collective noun for wizards? I know it's a coven of witches, but what do you get of wizards??"

Well, my knowledge (on this) is zilch, and you, folks, are those "connections" he speaks of. So, please, for the sake of my reputation, not to mention your own, roll up your sleeves, put on those thinking caps and come up with an answer.

And in partial non-response (perhaps I mean nonsense response) to the question, here's a good site that I Googled in my attempt to answer him:
http://www.ojohaven.com/collectives/ Just don't get side-tracked from your mission by the cleverness there.