Box.net - Free Online File Storage, Internet File Sharing, RSS Sharing, Access Documents & Files Anywhere, Backup Data, Share Files
Got this from Russell Beattie's blog. If you don't have a server out there that you can store your data into, and was happily experimenting with that GMail-turned-online-disk-space plugins, this could be just the thing for you.
The site has some recipes for success. Really easy signup process (tm). The website is simple yet pleasing to the eye. The name is short and sweet and clearly defines the value proposition.
Will take it for a spin. :D