I just found out that Microsoft has just opened the beta of the Sky Drive service on Live.com. For free you get 500meg of storage, you can install an ActiveX component so you can drag and drop files. I love having some storage that I can access easily, while this service dose not have an API to it I hope we will get that soon.

By the way if you are looking for more space, a better client and better integration for a backup solution check out Elephantdrive they have a cool client that will keep files and\or folders that you specify backed up.