As a matter of fact, a load of us over a TWoP are in the middle of such a round robin right now. This is the original post (http://forums.televisionwithoutpity.com/index.php?s=&showtopic=3128465&view=findpost&p=12501917) and if you follow through the next pages, things get more elaborate. Join in, seriously - it is worth joining TWoP just to chime in with the fic. Plus we're nice. Really.