I've been playing with the latest beta of the Codetek Virtual Desktop. The improvements over the first version are significant and well worth your time to check out, especially if you come from the X Windows world of 3x3 desktop setups. Having Netscape install it's own color palette not required. All kidding aside though, it makes using the 15" iMac much easier.
While I'm pimping apps, I might as well toss in a nod to TigerLaunch from Ranchero Software which has to be the simplest app launcher available for OS X. It installs a menu bar icon with a drop down full of your installed apps. You can configure the list of apps. Select an app from the list and it launches. That's all it does, but of course, what else would you need it to do? ;-)