It's a great service. Beta is a little choppy on the Android, but I think it's a 3g thing. It's fine on wireless. I've handed out invites whenever I could.
It's been great for me too, even with my *ancient* Android phone. -- My Blog 2.0
what is said android application called? and where does one find out information about the beta? i don't want to sign up necessarily, but I'd like further reading if you know of a homepage for it.