Sounds pretty cool; found it on Lifehacker. Still, I don't know if I'd trust it for serious stuff. It's open source, but I'm not the most awesome code reader enough to know if it's legit or not.
Looks like it could be a good alternative to the old yousendit.com days.
Shit, the limit is 10MB. That kind of limits its appeal. I can do bigger than that with GMail.