Mary Jo Foley has a recent post that highlights one of the hypocrisies you often encounter in the OS X camp. This line highlights it best:

Parallels executives have been quoted by various outlets as being angered by Microsoft’s policy to allow only the pricier versions of Vista to be used with Parallels without an additional license. But the Parallels brass don’t seem overly upset by similar licensing restrictions allegedly imposed by Apple regarding the legalities of running Mac OS X in a virtualized environment on non-Apple hardware.

UPDATE: Changed the title, fixed some tensing and reworded the first sentence, it felt clunky.