Grammy-nominated rapper B.o.B. performed his song "Airplanes" on a Delta airlines P.A. system. Now, cute as seeing this on Delta's official YouTube channel is, how annoying would it be to be forced to listen to B.o.B. warbling along to an MP3 of his own song, through a tinny airplane sound system? Can't we all just agree to sit in tense, angry silence when flying the friendly skies?

Authorities are interviewing all passengers on a Delta flight to Japan after a knife was found under one of its seats. Last week, box cutter blades were found aboard a Delta flight from Japan to the U.S. Stop it, Japan.

Flying is the worst. Unless you happen to be on the same Minneapolis-New York flight as rapper Kanye West, in which case he will perform a short a cappella version of his 2005 hit "Gold Digger." Over the flight intercom.

A Delta pilot was arrested today after Dutch police detected alcohol in his system.

• Bill O'Reilly is already threatening to totally ruin 2010: He says he's working on a book about Barack Obama which will come out next year. [NYP]
• Twitter fan Gary Vaynerchuk is getting seven figures to write 10 books about Twitter. And some think the publishing world doesn't "get it"! [WSJ]
• Hollywood is cutting back on the big pay packages for A-list stars. [WSJ]
• Ed Schultz is taking over the 6pm slot on MSNBC with a new show. [HP]
• No joke: Delta will soon sell its in-flight magazine on newsstands. [WWD]
• More on the recent round of layoffs at Condé Nast Digital. [PaidContent]
• Ad man Peter Arnell's disastrous rebranding of Tropicana also led to a 20 percent drop in sales in January and February. Nice work. [AdAge]
• Jon Stewart had a few words of advice for Rush Limbaugh last night. And Stephen Colbert went to town on Glenn Beck. [HP, Buzzfeed]
• NBC will air the final episode of ER tonight with a three-hour "event." [NYT]

Unfortunate news for frequent flyers who also happen to be sexual compulsives: Both American Airlines and Delta now say they will block access to porn sites on their in-flight WiFi networks. [Mirror]

Until the end of October, Delta is offering discounted helicopter rides between JFK and Manhattan: It's just $45 each way, assuming you're getting off (or getting on) a Delta flight. That's, like, the same price as a taxi! And it only takes eight minutes. [Reuters via NewYorkology]

• New York's Adam Platt visits Convivio and gives Michael White's kitchen three stars. [NYM]

Delta Airlines plans to put Wi-Fi on most of its U.S. flights by mid-2009. The Aircell-powered service will cost $9.95 on flights up to three hours, $12.95 on longer trips. [NYT]

Chairman Roy Bostock agreed to a merger yesterday, but not in his capacity as Yahoo's board leader. Bostock is also Northwest Airline's chairman. Yesterday, he signed off on its $3.1 billion deal to merge with Delta. Let's see if the Yahoo-Microsoft merger suddenly lurches forward, now that Bostock can give it his exclusive attention. We're bullish on more meetings.