Re: I was wanting to know if you guys could tell me some major theories on AI.

The web is littered with such things, it's hard to get them down into a
single answer. I advise checking the following places which should lead to
more links.

New Groups

comp.ai
comp.ai.*

FAQs for these groups should give references to web sites and to books.

You might also check out some of these sites:

University of Arizona Artificial Intelligence Lab

University of Illinois Chicago Artificial Intelligence Links

It's a big subject, you are bound to find a lot of info.