Flexbeta is reporting that Windows XP SP1 and SP1a support ends on October 10, 2006

Support for Microsoft Windows XP Service Pack 1 (SP1) and Service Pack 1a (SP1a) ends on October 10, 2006. Microsoft will end support on this date. This also includes security updates for these service packs. Microsoft is providing final notifications to customers regarding the end of support for these products.

Windows XP SP1 and SP1a support ends on October 10, 2006