Hmm.  Well, if you want to be the Joker, you could always play a Grey Jester, from Heroes of Horror.  At-will Tasha's Hideous Laughter, to put a smile on everyone's faces. :P<br/><br/>Alternately, from the Underdark book, there's the Gloura, a fey that gets casting as a 7th-level Bard with only +2 LA and 7 HD.  You'd also get Charisma to AC and Saves, which could come in quite handy.