The photo upload site I mentioned - Smugmug - isn't a free site, its been around for a while, and is heavily used from what I hear on photo forums. I think it will be around for a while. I only put the best of the best - or most important pics up on the site.

Besides, I'm not talking long-term archival storage here. I use CD's (actually now DVD's) for that. What I'm talking about is the "oh crud, my house burnt down and I forgot to take copies of the latest CD's to work" kind of backup.