Lifehacker has a nice post that shows you how to add some Windows 7 features to your Mac OS X computer. One of the nicest hacks is the ability to show a preview of an app when it's in the dock just like Windows 7 does with its Aero interface. There's also a way to remap your keyboard to use Windows-Style keyboard shortcuts. Most of the features are added via applications that cost less than US$20 each. Point your browser to the article for the rest of the tips. Enjoy!