I haven't looked at jungledisk, but I use SpiderOak for home use.
You get 1-2GB free which is all I need
for critical stuff. The linux client works well and is provided in RPM format w/ repo I
believe. Their data
rates may not be competitive though.
I use them for personal as well. Expensive (not as bad as
rsync.net) and honestly thier
cli client leaves a
bit to be desired in terms of granularity, however I do like them, we just can't
afford them.
Thanks!
jlc