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This and more important news from your Fast Company editors, with updates all day. Groupon's Accounting Tricks . Groupon, reacting to pressure from the SEC is filing a new S1 form that ditches a controversial Adjusted Consolidated Segment Operating Income accounting trick.

I hope you had a great time over the weekend and are ready for the work week. [More]

During a press conference this weekend, Miami Dolphins Wide Receiver Brandon Marshall revealed that he has been diagnosed with borderline personality disorder, a serious emotional disorder which leads to severe depression. CBSNews.com's Ken Lombardi reports.

PGT: Phil Mickelson missed the weekend at The Greenbrier Classic by two shots, finishing the first 36 holes on 3-over.

Renting with Airbnb, RIM layoffs, Facebook iPad app revealed, and more.

Apple's explosive sales, pondering a Yahoo-Hulu marriage, Spotify's American success, and more.

Sometimes you really need a weekend to relax.

Rory McIlroy said before the British Open began that two level-par rounds of 70 would suit him just fine and while his arithmetic was slightly out the Northern Irishman heads into the weekend at Royal St George's right where he wanted to be.

Last year I met my four-month-old nephew, Landon, for the first time.

PGT: Tiger may not be at Congressional, but Rory McIlroy may well wind up facing Woods of 2000 as he takes a record-setting score of 11-under into the weekend at the U.S. Open.

(PhysOrg.com) -- Over the weekend, at a physics conference in France, Fermilab CDF collaboration member, Giovanni Punzi, gave a presentation where he showed some slides that appeared to back up the rumors that cropped up a month ago on the Internet, suggesting the team had found some evidence that might hint at the existence of a previously unknown particle; which would of course refer to the infamous Higgs Boson.

1. Sony Greece seems to have been hack attacked , the latest in a horrible round of digital invasions into Sony's network

How better to deal with Monday morning than with our handy news summary, iFive? What's that? With a wordcloud

Allan Grant met his company's co-founders, Jeff Yee and Nori Yoshida, at a bar.

1. In a surprise move, AT&T this weekend revealed it has made an offer to buy the USA branch of global telecoms operator T-Mobile for about $39 billion. It will create the largest cell phone network in the U.S., but the deal isn't closing for a year--during which time competitors regulators, lawmakers and the public will have a lot to say on the matter.