From OSNews:

The website of a Miami-based networking and security solutions reseller became inaccessible Monday, shortly after the company began advertising an unauthorized Mac clone for a fraction of the cost of Apple’s cheapest system. Dubbed OpenMac, the USD 400 offering from Psystar Corporation is described as ‘a low-cost high-performance computing platform’ based on the ongoing OSX86Project - a hacker-based initiative aimed at maintaining a version of the Mac OS X operating system for everyday PCs. The website is back online now, and the machine has been renamed to Open Computer.

I would like to see some alternatives to the hardware sold by Apple (or a reduction in the price of the original hardware), but I’m not sure how many problem you will run into if you try to run OS X on this. And, honestly, it doesn’t look nice.