The big news Sony’s press conference for its new line of eReaders was the deal with AT&T (NYSE: T) to provide its 3G wireless connection to the Daily Edition, Sony’s first wireless reader. Neither Sony (NYSE: SNE) nor AT&T would say what the revenue split is. But it’s probably not too different from the arrangement between Sprint (NYSE: S) and Amazon (NSDQ: AMZN), for the Whispernet wireless 3G system that lets Kindle users download books, blogs, newspapers and magazines. And if the Sony/AT&T exclusivity agreement is like its rivals, the revenues aren’t going to add up to much.
— Best guess: Sprint told investors last May that Kindle drove most of the wireless carrier