Downloaded and installed SP3 to see how it goes and I’m happy to report no fires. it’s just a roll-up of all the other patches so I wasn’t expecting much but at least it didn’t go service pack 2 on me and crash the computers. The only trouble I had was the computer went into hibernate mode before the update was finished and the install failed so I had to do it all over again. One more funny note: after SP3 was installed, I had to install another 3 patches. Never ending loop these updates are.
Update: SP3 doesn’t have any major software changes except you won’t be able to downgrade to IE6 from IE7 unless you uninstall the service pack. Source: InfoWorld