California's Voter Registration Deadline is October 18, 2010. You can print out an application here, California Voter Registration Site, complete, sign, and mail it in. It's that easy.
It's a common misconception that all persons who have been convicted of a felony or are in jail lose their right to vote. Although the rules vary from state to state, in California persons convicted of a felony can still vote unless they are incarcerated or on parole. See A Voting Guide For Currently or Formerly Incarcerated Californians. That means you can vote even if you have been convicted of a felony, if you
* Are in a local jail as a result of a misdemeanor conviction;
* Are awaiting trial or are currently on trial and have not yet been convicted of a crime;
* Have completed parole for a felony conviction; or
* Are on probation.
There's a lot at stake on November 2. If you don't vote, don't complain!