Newsom formally announced last month that he would seek the state's highest post in 2010, when Gov. Arnold Schwarzenegger's term expires.
During his campaign throughout the state, the 41-year-old Democrat has touted his mayoral accomplishments in the areas of health care, civil rights, support for teachers, economic development and the environment.
He's also established an online campaign presence via social networking sites such as Twitter, Facebook and YouTube.
Former governor and current Attorney General Jerry Brown, 71, and Los Angeles Mayor Antonio Villaraigosa, 56, are also considered potential Democratic candidates.
Among Republicans, former eBay CEO Meg Whitman, 52, state Insurance Commissioner Steve Poizner, 52, and Tom Campbell, 56, a former U.S. Congressman representing the South Bay, have set up exploratory committees for governor.
Tickets for Newsom's 6:30 p.m., closed-to-the-media, "New Direction for California" event, featuring singer Tracy Chapman, range from $500 to $25,900.