Someone posted today the following project on the above site:
Hack a PC power supply to work from 12 vdc. Hello, I need plans on now to re-wire a standard ATX power supply to operate on 12 vdc. (I dont expect this to cost more then $50:)
What's interesting there are already 3 bids. Three people promised to do it for $50 in 2 to 7 days. In my view it is hardly possible at all, i.e. essentially a new design is required, which can't cost $50 even if done in the cheapest district in India. Am I missing something?