If you haven't heard of it, dropbox is in open beta (meaning everyone can sign up.)
Here is a video explaining what it is:
https://www.getdropbox.com/screencast
brief sum up:
Works like you do
No complicated interface to learn. Dropbox runs in the background on your desktop.
Worry-free syncing
Sync your files automatically to your computers and the web.
It's everywhere you are
Sign in and access your files from any browser or mobile device.
Easy sharing
Sharing files with your friends and family is just two clicks away.
Photos
View your photos in a gallery and share them easily with anyone.
Like I said, it's free, but everyone gets 3 gigs of extra storage for referrals, so please sign up through my referral link .