And rejected from YC the first time, if I remember correctly.

Ahem, TicketStumbler.

Just kidding, I'm in love with their service and am a very happy user. They're backed by Sequoia and some other BSDs.

How the hell do you make something boring like file storage viral and cool? I don't know but Dropbox just did it.

How is it viral?

Not only have I enjoyed it so much I've told countless friends about dropbox, it also auto invites your friends to join when you share a file with them. That's in part why they already had over 100,000 beta testers before even launching.

Agreed. It's the second one (after reddit) I will actually use, and the first I would pay for - anyone know what pricing will be for going beyond 2GB?

Answering my own question: $10/mo for 50GB. Not bad.