I just stumbled across a Microsoft page that says support for Windows XP SP1 will end on October 10, 2006. I’m not sure why anyone would still be stuck back in the day of Windows XP SP1 unless they weren’t a big fan of Microsoft’s new security features. I happen to like the new features myself and it helps me feel just a little more secure.
There is actually some reasoning behind Microsoft’s madness believe it or not. They have a Support Lifecycle all drawn out for you so that you will know how long they will continue to update their software. Basically they will provide security updates for 10 years after a product has been released…so Windows XP users still have plenty of time.
Think about all of the poor IT people in the world that will have to deal with an insane amount of questions regarding Vista and Office 2007. That will probably be enough to drive people to quit their jobs! Get ready for a surge in IT job openings. 
Where I work, we are still on SP1 because in the earlier days of SP1, there were some major issues with moving to it. However, now they are currently rolling it out.
At home, I have been using it since shortly after it came out.
It isn’t 10 years – support for Windows 98 is already gone/going so they’re not directly true to their word. But to be honest, who would have XP SP1 and refuse to install SP2? Unless they had next to no RAM and a tiny hard disk.
I’m one of those still with SP1, could never get SP2 to install correctly
, so just gave up. Plenty of RAM and hard drive space, but each time I tried to install I would get errors or certain programs wouldn’t run correctly.