Sen. Joe Lieberman actually went through with his retirement announcement! Who knew it would ever be this easy to get rid of him? Thanks, Joe! Let's check out what he said at today's grand press conference.

Regis Philbin, venerable 79-year-old host of Live! and other gigs, announced today that he'll be retiring either at the end of the summer or sometime in the fall. Live! cohost Kelly Ripa will eventually be joined by a new partner.

Natalie Mendoza, who suffered a concussion while playing the villain Arachne in the first preview of the disastrous new Broadway musical Turn Off the Dark, is apparently leaving the production, according to inside sources. Good. Safety first, after all.

Oscar-winning wizard of technique Steven Soderbergh (Traffic, Oceans Etc.) is going to call it quits after a few more movies. Says his regular collaborator Matt Damon, "He's kind of exhausted with everything that interested him." He might try painting next.

Keith Olbermann has suspended his Twitter account because some people keep accusing him of being a rape apologist. Have you no decency, Twitter? At long last, have you no decency? Good day, Twitter. Good. Day.

Ev Williams is resigning his post as CEO of Twitter after two years and handing the reins to chief operating officer — and Twitter board favorite — Dick Costolo, confirming reports of Williams' impending exit we first surfaced in July.

Gordon McLeod has been packing up his office; today is his last at the Wall Street Journal. His ejection is complicated. But some coworkers think they know what did him in: insulting Steve Jobs in Rupert Murdoch's presence.

Barack Obama's top economic adviser, Larry Summers, will leave his post in November and return to Harvard.

Mark Zuckerberg's email ghostwriter has ditched him. Who is going apologize for the Facebook CEO's privacy sins now?

JetBlue flight attendant Steven Slater's infamous job exit has already been animated. What's next? How about footage of the real thing: watch as the plane's emergency slide inflates before Slater exits (although we'd imagined it to be more exciting).

He tried to tell us. JetBlue steward Steven Slater apparently posted to an airline message board in the months before his meltdown, warning of new pressures on flight attendants—and how the carry-on baggage situation had become a "monster."

Photos of an aspiring broker purportedly telling off her boss garnered widespread news coverage and more than 105,000 Facebook "likes" Tuesday. Too bad the story was published by two guys who have pranked the media before.

Ann Moore is out as CEO of Time Inc., the New York Times' David Carr reports, and will be replaced by Meredith Corp. exec Jack Griffin, another traditional magazine executive.

The Hubble has spotted a "hypervelocity star" (known as HE 0437-5439) ditching the Milky Way at 1.6 million miles an hour. It's not headed toward earth, which is a relief, because what the hell could you do about it? [CBS]

The founding editor of the Wall Street Journal's glossy lifestyle magazine has flown the coop. The newspaper is making kindly noises about the departure, but we hear the editor, Tina Gaudoin, has wanted out since at least last summer.

It looks more and more like Yahoo is offering big money for Foursquare—and like Foursquare creator Dennis Crowley is taking his time deciding whether to accept. It can't help that's he's lost one potential advisor, his longtime girlfriend.

Can Digg ever become the powerhouse it so badly wanted to be? It's a natural question amid the departure of five-year CEO Jay Adelson, the latest in a line of painful goodbyes for the social news site.

The Huffington Post has a way of squandering its own victories over the establishment press, and it's happened again: Larry Roberts, the investigations editor triumphantly lured from the Washington Post, has resigned.

The founding publisher of HarperStudio has departed, and parent company HarperCollins is expected to consider what to do next with the imprint, originally launched to experiment with new business models for publishing. Woe unto the aspiring blogger-author?

Carol Bartz must be getting lonely. First one of the Yahoo CEO's assistants ditched her a for hipper chief executive. And now her top salesperson is doing likewise — and Bartz learned about it by reading the news.