Great San Francisco History web site

SFGeneaology.com is a site created "...to provide FREE internet access to genealogical and historical information for San Francisco and San Mateo Counties, and the State of California."

That said, there is some great information about the history of different neighborhoods, dating back as far as they can find data (much of which is donated).

For example, looking up information about the long-since-defunct Lone Mountain Cemetary (where USF is now located), I found the following:

Dates of Existence: May 1854 to 1862
Location: between 162 and 170 square acres
Number interred: 7,000 (1862)
Moved to: see individual cemeteries
Notes: this cemetery was divided into the Calvary, Odd Fellow's and Laurel Hill cemeteries

Curious about what was in your neighborhood 200 years ago, if anything? This site just might have some information!