Volunteering As ATC

I noticed in places like vatsim that people actually volunteer as live atc. I was wondering either how they do this, and/or where i can find an atc simulator, because im interested in seeing what it's like to be an air traffic controller.

I would say your best bet is to e-mail them and ask this, I'm sure they would be willing to help.
You could also check out their forums.
http://forums.vatsim.net/
Sounds like fun.

First you have to register with a VACC. Where do you want to control? Go to that continent's VACC and sign up, then go to the country's VACC and sign up (for example I am registered with VATEUD -Europe). Then email that country's vACC and ask them what you need to do to become a controller (usually that information is on ths site too). Then, after some (or a lot of) training and some tests, you'll be able to control in that country.