Found this website called SingShot. Basically, you can record yourself singing to hundreds of different songs -- the instrumental versions -- and the recordings end up on this site for everyone to, ahem, enjoy.
For example, sit back and enjoy the scintilating rendition of R.E.M.'s "Shiny Happy People", sung by "stiefie" from Germany. Michael Stipe has nothing to worry about.
If nothing else, it'll provide American Idol fans a place to hear really bad renditions of songs while waiting for season 7 to start in January.
All you need is a mic, and some guts. Plus, it's free.
After you cut a track, post the link in the comments section. It's gotta at least be as good as Germany's very own "stiefie", right?
Ich drücke dir die Daumen!