I'm looking for the same sorta service for my impossibledecals.com site I just created.
I have some cash & bitcoins ready to the person who can make this happen. Maybe we got halfers on the code.
I'm thinking sort of like how Camp BX has it, where you click a link and it generates a temporary send-to address for the user to send the bitcoins to, and then after it gets some confirmations it's valid payment. Surely this has to be a possibility if camp bx does it. Impossible wants it possible!
I think the bitwillet.com system would be very easy for you to implement on your site. But that way you would need to trust them and i think they charge fees, but hey, so does e-junkie, and you are using them