Yet another slick tip I found while parsing my Mac OS X Hints feed is a fairly simple hack for setting the dock and menubar to auto-hide based on which app is in the foreground. This can come in very handy if you usually like to see these elements, but often work in screen-hungry apps that can't auto-hide them on their own. I'm even interested in trying this on Photoshop, which can hide the dock and menubar, but only when in full screen mode (which I don't often like to use).
The tip essentially involves using something like the Property List Editor (a free app included in Apple's Developer Tools) or Pref Setter to copy and paste two short lines of code into an application's info.plist file. The hint contains everything you need to hack away, including a hint from The Rob himself which I'd like to echo: definitely make a backup of the app, or at least the info.plist file, before you copy and paste your way into a problem. That said, enjoy having the best of both worlds.