Brands to Watch: Twitter, RIM, Gucci, Pfizer

Twitter fixed a security bug that disabled its website version today, and plans to step up promoted tweets (as only one-fifth of its 160 million registered users follow brands or companies).

Adobe misses earnings forecast on sluggish sales.

AIG nears sale of two units to Prudential.

BlackBerry-maker RIM could unveil its tablet (nickname: the BlackPad) as early as next week.

Clorox unloads its STP and Armor-All brands.

DC Entertainment's non-publishing business is moving to Los Angeles as part of Time Warner shake-up.

Disney former executive assistant pleads guilty to insider trading charges.

GlaxoSmithKline sues Roche, Genentech over cancer drug patent.

GM resumes political donations.

Gucci looks its fashion heritage for the spring/summer collection at Milan Fashion Week.

HSBC CEO threatens to quit.

IBM CEO says consumers aren't sold on "smart grid."

Pfizer challenged by US DOJ joining whistleblower suit over organ transplant drug Rapamune.

Thompson Publishing files for bankruptcy as precursor to sale.

UniCredit CEO steps down over fears of Libyan involvement in Italian finance.

UnitedHealth acquires software developer A-Life.

VideoEgg is acquiring Movable Type blog platform owner Six Apart to form Say Media.

Wal-Mart adds dollar store items as retailers scramble to accommodate budget shoppers.

Wyndham now owns Planet Hollywood Hotels brand.

Sports teams expand mobile marketing efforts to better connect with fans.