250 MB extra DropBox space
DropBox is a very handy online storage and backup utility which keeps all your PC's in sync continously and provides previous version support. I use it on all my PC's to sync my documents. The advantage of DropBox is that the files are stored online, so you do not need both PC's powered on in order to sync.
Another nice feature is folder sharing: share a folder with a group of people. We use it for various projects and it is really handy as you have all files of the other project group members synced to your pc.
To try it, click the link below to register with DropBox and get an extra 250 MB from me for free!