There are a few options available. Some free, some not.
The FREE services include:
–Box.net (1GB free, share with friends, uses SSL)
–Windows Live Skydrive (5GB free, uses SSL, share with friends)
–Omnidrive (site unavailable at time of this post)
–Oosah (1TB free, drag and drop interface, share with friends, create slideshows; galleries; playlists)
Probably the most popular not-free service is Amazon’s S3, which is also accessible using JungleDisk.