Here's just a small but very useful tip related to Exposé that I have found out! If you want to bring all windows of one app to the front, just press F10 (the Exposé Application Windows button) twice.
For example, if you want to get all Finder windows in front, just click with the mouse on the desktop and press F10 twice. Isn't that great? I love Exposé!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031028031023724