I read where Microsoft took some engineers off of the Longhorn OS project, which will delay its introduction, to work on SP2 due to serious security issues in XP. SP2 was rushed a bit and they will most likely have some updates to it...especially since PC Magazine published this: http://www.pcmag.com/article2/0,1759,1639276,00.asp
In light of the recognized flaws with XP, I downloaded and installed SP2. I like the looks of the Security Center and it seems to be doing exactly what it is supposed to.
If it detects a potential threat, it will alert you. You will have the choice to block it, ok it for one use, or ignore the threat. This is especially helpful on sites you are familiar with and know to be safe.
So far, everything seems to be working just fine. But the PC Mag article is a bit disturbing.
Eddie