I'm also interested in the answer to this question; as far as I can tell, without being shady about ignoring people's AUPs, there isn't anyone who beats s3. If this is the case, I'm considering entering that market at the $0.05/gigabyte price point (both for storage and transfer)<p>rsync.net; it's cheaper than s3 if you transfer up and down a lot, otherwise, more expensive. I think it's around a dollar a gigabyte month if you buy a whole lot, but transfer is free.<p>dreamhost and other shared hosting providers often give you 500GiB/month for like 10 bucks... but if you read their AUP, I think using it for backups is prohibited. still, it's probably worth trying if you are on a tight budget.<p>I don't know of anything that beats a supermicro with 16 or 24 2TiB disks in a co-lo, though.