Four in the morning

1. Dead horse beat: Local news in Los Angeles is often an extended commercial for the network's entertainment shows. Robert Rector

2. Cluttertweet: There is no mailbox that junk mail will not find (and eventually fill). Twitter ads appear to be the latest iteration. Austin American-Statesman

3. DocumentClouds forming: The Atlantic, New Yorker, Mother Jones, MSNBC, WNYC and Washington Post have joined the nonprofit DocumentCloud. NYO

4. Buzz generator: Cliff Barney is psyched about reporting experiments at UC Berkeley's j-school. Calbuzz