If you're a really, really big Bill Gates fan, maybe this is this product for you. Amazon.com is flogging a Limited Numbered Signature Edition of the Windows Vista Ultimate upgrade.

The upgrade costs $259, which is a bargain at just $10 more than the regular edition.

The Limited Edition box look similar to the ordinary one, except that it's got a serial number printed prominently on the front, and Gates' signature just beneath it; it's available for shipping now, to be delivered after its release on 30 January.