Ocelot199 on Toolnavy posted me this mp3 today which is supposedly a leak from 10,000 Days. It’s only short:

http://www.fourtheye.net/tool-leak.mp3

Disclaimer: I haven’t had a chance to listen to it since I’m at work, so I can’t vouch for it’s integrity. Word is on Toolnavy that it sounds pretty damn good, regardless of who it is.

Edit: In my opinion, it sounds ok, but like the alleged rehearsals that came out earlier this year, it could be anyone. For my mind the guitar just doesn’t quite sound like Adam’s enough, but considering Joe Barresi is now in charge, there’s no reason why it hasn’t changed tone a little. Make up your own mind and comment below. (14-March-2006)

Edit: Definitely False.  Nice try whoever came up with it.