Thanks for the responses guys, I've tried the paper clip trick and it seems that the problem isn't my PSU. I've checked out the troubleshooting FAQ that banthracis provided, and I'd like to say I've checked out all the possibilities except for breadboarding. Short of doing that, since I'd have to wait for the weekend when I'll have enough time on my hands to take everything out and reassemble, would there be any suggestions as to what can be causing this?
Simply put, when I have the power hooked up, and power button pressed, absolutely NOTHING happens. Fans do not start, front LEDs aren't on (mobo may not have an LED), nothing. As I've said, the paperclip trick showed that my PSU does work.