Thanks everybody for the great info. Two wheels, that comparison chart was really helpful. Cliq, it seemed box.com was more for business. Cromag, I'm using Ubuntu too. I'll check out SpiderOak better. David, 47GB! How'd you get so much? I don't have that much stuff but when you put the contents of a flash drive onto something that takes you over the 2GB Dropbox limit in a big hurry. teh, I've found Google Drive's uploading to be so slow. Small files it's fine. Anything bigger can take hours. Thanks pen. I thought SugarSync looked really good too. And yeah, you've got too many services.
Vincent, but are you sure about that?
(But I did notice on Two wheels comparison link that Dropbox and iDrive do offer features copy.com doesn't--like restoring deleted files.)
And what about MediaFire? I've got an account there for posting photos and stuff on other sites, but supposedly it's great for backups and cloud storage too. My experience though is that when you upload a folder, Mediafire breaks it down into files in the cloud. Which is an organizational pain in the butt. Plus you have to decide file-by-file to make a file private or not--and the default is public. (Not a very good feeling for security.)
And that's another thing, Mediafire has only a 200MB upload limit. Which isn't very big. What services have big upload maximums?