Nice car in your sig. It's my new background 🙂
I have gotten three interviews from my school career center. On the general job sites, I have gotten one callback and deciding on whether to interview with them or not. I think it was from monster. I also use texasjobs.com (that doesn't help you though!) The local newspaper sucks. Have you tried dice.com?
Most jobs ( I think like 85%) are not advertised outside the company on average. So no, you're not going to see all jobs available in the economy. That is why networking is probably your single best source.