There are a few opensource projects that will allow you to run MAC OSX on PC hardware. Just in case you have a PC and want a mac (but don't want to spend the $$$$). Even though the mac mini is about $500.
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http://www.osx86.theplaceforitall.com/howto/
http://osx86project.org/
This is another that will allow you to run MAC osx on your PC within an emulator.
http://pearpc.sourceforge.net/
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Linspire is also a nice alternative to the windoze desktop.