I've been having some fun with this and thought I'd share it.

http://www.sr.se/p1/src/sing/index.htm#

Type in some lyrics and see what comes out.

If you email it to yourself you get a link that you can post here to let us hear your masterpiece!

Here's one of mine...
http://www.sr.se/P1/src/sing/index.htm?key=Y9U0G65F#