theres still no easy way of getting MacOS X on x86
which leaves you with only a few options that will give you an OS which can actually do anything
Id say that linux is the best choice there are many good distros like SuSe, mandrake, ubuntu etc
but you might be better off with something a little easier to install like Linspire, but it costs money
also theres stuff like solaris that might be of some use
