A bit off the BI track, but I wanted to draw your attention to Matt's blog, where he's written an excellent post about the backup facilities in the upcoming Windows Vista. The backup is called "CompletePC Backup" and it has loads of cool features which Matt goes into more detail about.
The thing that grabs me is the way it stores backups - in virtual hard disk format (VHD). These are images of your machine which you can run in Microsoft Virtual PC or Virtual Server. Effectively this means you can have a VHD of your machine on a USB key and run your machine off any other machine which has Virtual PC or Server installed on it.
Very cool indeed!