Interesting link, but I bet these CPUs are pretty big at the moment and are not really appropriate for mainstream use anyway.
I was trying to delete my post earlier but the options to delete your own post have vanished ( maybe zerohour has removed that ability unless your an admin or mod or w/e )
Took some searching but apparantly (if wikipedia is to be believed) it runs a MIPS based instruction set.
[ame=http://en.wikipedia.org/wiki/TILE64]TILE64 - Wikipedia, the free encyclopedia[/ame]
Pretty specialised high-end part. Runs SMP linux.