There’s a good post from one of the IE dev team on MSDN blogs regarding XPSP2

At http://blogs.msdn.com/jeffdav/  Jeff has a good summary of XPSP2 good and bad. He makes some interesting comments, and it’s nice to get inside the brains of the guys that write the stuff we use.  It’s frustrating that you can’t just make mods, and that it all has to work well, but that’s the fun of coding for a corporation.