While Microsoft had planned to stop selling Windows XP licenses by January 31st, the company has extended that deadline to May 30th.
You could blame the general mediocrity of Vista for the extension, but bigger still is probably the rise and popularity of netbooks and other PCs packing slower, lower wattage processors. While XP can be loaded onto these systems through a (necessary) loophole whether or not Microsoft extends licenses, the platform is certainly keeping XP in the front and center of public consciousness.
It'll be interesting to see if Microsoft just continues extending XP licensing until Windows 7 comes out. I'd bet that they will. [BBC]