I got a kick out of this one. If you have a toasted, or even an outdated power supply, this is a nice build that you can use to convert it to a fume extractor for soldering. Heck most power supplys have a fan already built in. And the case looks nice too. Only difference, I think I would have built it in with a wall wart.
http://www.instructables.com/id/Soldering-fume-ventilator-from-PSU/