I'm usually quite late to pick up on new sites and that (i still hate Twitter (@VMarquall) for example)
However i am a huge fan of a awesome site called Dropbox.
It basically allows me to upload any of my files to the cloud and then when i need them again i can jsut log in and d/l'ed them to a different computer. No USB required! You get 2 gb of space and if you use the shiny referal you get an extra 500mb :P
Check it out, you can also get a mobile and desktop app (for drag and drop uploading)