The City and County of San Francisco has a new open data site:
Please follow the link to the site to search, browse and view San Francisco data.

Description: A Street that has been paved within the last 5 years is added to the Utility Excavation Moratorium list.
Agency Name: Department of Public Works
Date Released: daily
Time Period: the last 5 years
Frequency: daily
Location of dataset:
Format: CSV
Location of Data Dictionary: n/a

DataSF is a clearinghouse of datasets available from the City & County of San Francisco. Our goal in releasing this site is:
(1) improve access to data
(2) help our community create innovative apps
(3) understand what datasets you'd like to see
(4) get feedback on the quality of our datasets.