The clip that lets the fuel door "pop out" fell out. This is also the clip that most people hang there fuel cap on. The assembly is $32 on onlinemazdaparts.com. If someone has one lying around I'll give you the money first. Let me know if you have one.

http://www.trademotion.com/schematics/5/5455530.gif

It's number 7 in the picture, but i'll take your whole assembly if need be.