Courtesy the Maricopa County Recorder's Office -
October 4, 2010 - Deadline to register to vote for the November election. Already passed.
October 7, 2010 - Early voting begins. Early voting locations and hours listed here. Depending on the location, the deadline to drop ballots off at one of those locations is either the Thursday (10/28) or Friday (10/29) before the election. Already filled out and mailed back my ballot.
October 22, 2010 - Deadline to request an early ballot.
November 2, 2010 - Election Day. All early ballots must be turned into County Elections or a polling place by 7 p.m.
November 3, 2010 - The 2012 campaign season kicks off. (OK, this last one is my personal addition to the list. It'll start slow, but really kick into high gear when redistricting is complete in 2011. :) )