I’ve played with several different online services for sharing files (not p2p) and here’s another one. Dropbox gives you 2GB to start with and you have the option to buy more. There’s a complete online interface but it also has a downloadable client that allow you to put files into a specific folder on your computer which will automatically synced to your online account. Interestingly enough, it seems to be catching the eye of many tech librarians as I’ve already used it three times to share files with others in the last week.
(In the interest of full disclosure, each use of the link in this post which results in a new account will get me an additional 250MB of storage space.)