I came across this a while ago too, and I think Linus mentioned it briefly in his infamous finger-at-Nvidia talk.
Epic Hack though. That's hack with a capital 'H'. It certainly qualifies as the cheapest way to run Linux!
"Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." --Brian Kernighan