Brands to Watch: Tiger, Twitter, Verizon & more

Barack Obama participates in first Twitter town hall on Tuesday.

Casey Anthony trial verdict blows up on Twitter, YouTube and the mobile web, garnering reactions from celebrities and presidential candidates.

Google retires Blogger and Picasa brand names in Google+ push.

Harry Potter star Daniel Radcliffe admits to alcohol problem.

JPMorgan Chase drops credit card collections in some states.

Justin Bieber fails to sell non-teen magazines.

News International's News of the World tabloid shocks with dead girl's phone hacking, amidst calls by Hugh Grant and others for editor's resignation.

Tiger Woods says he will return to golf in August.

Twitter acquires social analytics startup BackType, raises "millions" in financial backing.

Verizon drops unlimited mobile data plan.

& Artist Cy Twombly dies at 83.