This site looks really good, but I am not signing up yet.
I am famously promiscuous signing up with new services just so I can 'know what's going on', but when the first thing I have to do is to give this site my account and password for a credit card that I use, I stop and take a breath.
Who are these guys? Fred Wilson, a highly reputable VC blogger is the one who recommended it in his blog. Maybe he's an investor? I don't know. But for now, I am holding off.