1. Signing up without knowing ANYTHING about the service... nope.
2. It rejects mailinator emails, but fortunately it doesn't reject other temporary email services :)
3. It's not a signup for the service; it's just a mailing list. How disappointing. It doesn't even tell you any details about the service after you sign up.
All in all, I'm dissuaded from using it when it becomes available, and I'm glad I didn't sign up with my real email.