Another plug here for Lightroom and CS3.
Lightroom is a fantastic app. and in spite of it's sluggish behavior (on my G5) I can still edit big jobs much faster than with the ACR/Bridge combo.
As far as CS3... it seems to run quite a bit faster than CS2 which is the opposite of what I expected. Usually, new Photoshop versions have so many new goodies and functionality packed into it that each new version is noticeably slower the the previous.