Online Desktop?

In me never ending search for a solution that will keep my contacts up to date on my laptop pc, my home pc and my Mac, I stumbled across a very cool Web 2.0 site.  DesktopTwo is a web-based app package that looks and acts like your personal desktop; complete with email, address book, rss reader, instant messenger, file browser and 1GB FREE (for now) storage. 

I haven’t yet decided if it’s any kind of solution for what I was searching, but it’s always nice to find an example of great design and origina ideas.  I know there have been other similar attempts, but I don’t think any have been this successful or nice looking.