Following Bam Margera's outrage over a Roger Ebert tweet about Jackass star Ryan Dunn's death ("friends don't let jackasses drink and drive") Ebert has taken to his blog.

NBC hasn't decided which four new shows it'll pick up for the fall season. But the network has chosen its six favorites, and registered the shows' Twitter handles. Obviously, someone on the internet noticed.

Used to be rappers rode around in bulletproof limos, firing guns at musical competitors, singing about killing cops. Then gangsta rapper Ice-T performed a Twitter "drive-by" on a folksy soft rock singer. Introducing the new rules of celebrity warfare.

Four days after announcing his divorce split from Jenny McCarthy on Twitter, Jim Carrey returned to the medium to support Tiger Woods and attack Elin. Is Jim sending coded messages about his own divorce? Let's overanalyze.

CNN taps Rick Sanchez's Twitter responses for a "Talk to Rick" screen crawl showcasing viewer opinions. But apparently nobody edits it, because anti-semitic commentary made it on the air during an interview with Wolf Blitzer on Israel policy.

You'd think the Twitter fight with Adam Lambert would've been a trial by fire, but tragic, handsome Aaron Hicklin was confused and forlorn on his cellphone last night, tweeting messages that appear to be intended for email or text.

Not because she's undeserving, but because she doesn't know who she's supposed to ask. So now she's @-tweeting random people and performing the bizarre tasks they tell her she must do.

Multiple choice: Last night, jack-of-all-pop-culture Touré was... (a.) Twitter-hacked by his "cousin (PhD student/insane mf)" (b.) insensitive about delicate issues like rape, race, and sex (c.) a genius at stoking controversy (d.) all of the above.

Is this girl good at manipulating media or what? Tila Tequila wrote a blind item about the contents of her uterus. Blind items, the gossip world's congenital weakness! But wait, didn't she already do this, last May?

The problem with condensed Twitter URLs: You can't see where they go. White House correspondent Major Garrett tweeted a URL last night, and it went to a Vegas call girl website. Vegas, where some White House folks go next month.