Well it was fun while it lasted...
It was always a bit rubbish, but worked great as an essentially free 2nd tier backup. Suggesting DropBox, etc., as an alternative is nonsense though...that's like saying renting a car is an alternative to carsharing...My primary backup is Google, I'll look at S3 as my secondary now unless anyone else knows any other P2P backup solution?
P.S. I would have loved to have a fully open source option that ran off the bittorrent network, but the resiliency you would need for that would probably have needed higher than a 2:1 sharing ratio...