As you've maybe already heard, some people were able to load OS X on standard Intel IV machines. Here is a good resource to begin with, I am not sure how long it is going to last so have a look if you are interested!
http://www.strengholt-online.nl/osx_howto/index.htm
Plus try these informative links:
http://osx86.classicbeta.com/
http://osx86.classicbeta.com/forum/
http://www.concretesurf.co.nz/osx86/
http://www.research.gwgaming.net/