Radioshack/Wal-Mart/Circuit City does.

You can do this over ventrilo too, waste of space this is.

is this a good one? im asking for it for christmas, and if it sucks im gonna want to change it.

http://www.bestbuy.com/site/olspage.jsp?skuId=8328393&st=mic&type=product&id=1174694369477

ROCKETFISH.
I suggest a headset rather than a mic.

BUT Ventrillo requires that you have to hold down a button the whole time or use it's crappy talk on sounds thing which never works. Also Ventrillo does not have a built-in drum machine or records all your sessions.

You can set it to record all your sessions. Talk on sounds works perfectly fine when it's set right(or if it's on stereo mix, which this program uses)

I could have sworn Vent can be set so that you don't have to press any buttons for it to detect and send sound. Unless that's Teamspeak?

LOOK AT THE POST RIGHT ABOVE. YES. IT CAN. Vent has more ♥♥♥♥ then teamspeak anyways, it's built in for vent, not for teamspeak.

I can sing, and to some extent play guitar.
Not awesome guitar, but classical at least.

Classical music guitar > pop music guitar (especially boring technical metal)

I'm up for it. I've got multiple mics and a guitar with a 1/4 to USB. A Cortex Command ska song would be interesting.
EDIT: Damn, got beaten to rhythm guitar. Also, Jack plays drums.

ill be able to sing after christmas when i get a mic, and maybe guitar if i get one.

You may have the guitar, but it does require some skill to play.

Only if you want it to sound like music you've heard before, mind you.