I've got a high score screen at the end of every level in my game. I'd like to use a sound effect to rack up the score at the same time, similar to the one used in the Street Fighter series. Any suggestions on where I could find such a free sound effect?

Might be somehting here:

http://www.freesound.org/

I have access to a lot of sounds. I'd be willing to find you a few candidates just to help.