The 2010 Census TIGER/Line Shapefiles for California are available for downloading on the Census Bureau homepage. These are the Redistricting (P.L. 94-171) TIGER/Line Shapefiles. These files include the first release of the 2010 Tabulation Geography which includes the new tabulation blocks and any changes to Block Group, Census Tracts, and Census Designated Places (CDPs). A link to and information about the shapefiles can be found at:
The shapefiles are currently available at the ftp site and should be available through the web interface soon.
Please forward this message with anyone you think would be interested.
US Census Bureau, Los Angeles Regional Census Center