As a resource to California defense attorneys and to assist them in anticipating the claims against which they may have to defend, we provide weekly, unofficial summaries of the legal categories for new class actions filed in California state and federal courts in the Los Angeles, San Francisco, San Jose, Sacramento, San Diego, San Mateo, Oakland/Alameda and Orange County areas. We include only those categories that include 10% or more of the class action filings during the relevant timeframe. Employment law class action cases generally top the list, and this past week was no exception. This report covers the time period from March 23 – March 29, 2007, during which time approximately 51 class action lawsuits were filed in these California state and federal courts. Labor law class action filings accounted for almost 40% of these cases, with 20 new lawsuits (39%). Next came unfair competition law (UCL) claims, which include false advertising class action cases, with 8 new class actions (16%). A group of categories just barely broke the 10% threshold, including 6 new products liability class actions (12%), and 5 new antitrust and 5 new debt collection practices class actions (10%).