Here are some helpful and interesting links that capture the art, history, news and views of San Francisco.
writer and photographer Hank Donet's blog of San Francisco
Barbary Coast Tour from The SF Historical Society
SFGate, the sister-site of the San Francisco Chronicle
San Francisco Public Library's Historic Photo collection
sparkletack, the San Francisco history podcast
Alcatraz history and ticket sales. BUY YOUR TICKETS BEFORE YOU ARRIVE!
OldSF, an interactive map of the City using historic photos
The Virtual Museum of the City of San Francisco
Reel SF (San Francisco movie locations from classic films)
The San Francisco Travel Bureau site