Does anyone here use dropbox? If not I highly recommend it if you are a student, use multiple computers, or want to share files amongst your computers or with friends/family. It's similar to mobile me, and other types of cloud file hosting/sharing systems, but I think does a much better job for free. Any file you put into your "Dropbox" folder will automatically be synchronized with other computers that you have a dropbox on AND synchronized with online @ dropbox.com. You can also sync with mobile devices such as iPads, iPhones, and Android phones.
You can get a free account with 2gb, and get up to 8gb if your invite your friends, or pay to get even more. If you click on my referral link then both you and I get 250MB free, which is nice.