Yes, it has been released, you can even order a free CD ! almost 96% of the users haven't had any problems using it, and it fixes a lot of bugs and security issues .. but those other 4% had problems with their PCs while installing the SP2 update.
Before installing SP2, it is very recommended to BACKUP your data.
For more info on windows XP service pack 2 :
http://windowsupdate.microsoft.com/
http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/winxpsp2.mspx
Before installing SP2, it is very recommended to BACKUP your data.
For more info on windows XP service pack 2 :
http://windowsupdate.microsoft.com/
http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/winxpsp2.mspx