Last night i hacked together this piece, worked out nicely 
vimeo video: Arduino breakbeat sampler on Vimeo
info and sourcecode: POSSAN.SE
Impressive!
Can you include schematics?
Cool. The same as what Peter from Tinker.it did a few months back. Nice
i'll get back when i done some schematics, it's really basic, just buttons and a hardwired speaker
have to look up that other project.
This would be cool in chiptune style.