Hi Biohazard2,
When I got my 300W PS, the first thing I did was to get rid off the 80mm PS fan on it, since it didn't have enough air flow anyway. I think you should do the same, since yours is already dead.
After that, my Asus mobo in the BIOS can detect RPM for my PS fan. Make sure you got the 3-pins version for the 80mm fan. The wire to the fan connector also may not be long enough for certain mobo layouts or those full tower cases, so it's a good idea to get an extension for it. Of course, I was lucky I didn't need the extension on mine.
2cooltek got most of what you need to replace that dead 80mm fan or put in more of them for more OC'ing. Good luck on your OC'ing!! =)