Better late than never dept: NeoSmart has a brief rundown on SP3, which has started beta testing. It sounds like a third of a gig of goodness, including features backported from Vista.
Windows XP SP3 now contains 1,073 patches/hotfixes, not including those in previous service packs. Of the 1,073 included updates, 114 are for security-related issues. The remainder are updates to performance & reliability, bugfixes, improvements to kernel-mode driver modules, and many BSOD fixes.
As with Service Pack 2, these include both previously publicly-available updates (whether through support.microsoft.com or via Windows Update) as well as any and all privately-redistributed updates for select customers or partners with specific problems/scenarios.
And all free, of course.
