Well if you could rip off this: http://gatherer.wizards.com/Pages/Advanced.aspx it would be awesome, but a checkbox list will do too 
851 2009-09-17 12:51:10
Re: [feature request] Search & Filter (2 replies, posted in Site Discussion)
852 2009-09-04 10:29:10
Re: Funny (5 replies, posted in General Discussion)
853 2009-09-03 13:15:11
Topic: [feature request] Edition / printing details for cards (10 replies, posted in Site Discussion)
It would be nice to be able to pick the set for cards printed in multiple sets... would be especially useful for trading, where the set can alter a card's value, or so that people don't end up trading for a beta version birds of paradise when they're expecting it to be from m10.