Q: How does one become a moderator?
A: First rule: Don't ask to be a mod! Rather, be a model poster, act mature, and help point out problems to the current mods if they seem to have overlooked something (but don't be pesty about it). If we decide we need more mods, this will help make you more eligible. Being a consistent user for months on end will improve your chances as well.
I got this for Help/FAQ
Also you can read the topic that backflipair posted.