The technology editor of NBC's Today show has been caught out for publicising the iPod – under contract to Apple.

Last July Corey Greenberg described the iPod as "a great portable musical player... the coolest-looking one".

Even co-host Matt Layer was suspicious, telling Greenberg: "Let's cut the Apple commercial here right now, ok?" It turns out his suspicion was founded; Greenberg has admitted he received payments from Apple to talk up its products.

Greenberg was also on Sunday Today in March to talk about "the coolest thing," Apple's iPhoto service for digital pictures: "All the information goes up to Apple, Apple sends you a week later this perfect beautifully bound book."

On contract

Apple is not the only company to have paid Greenberg to publicize products; according to Greenberg Sony, HP, Epson, and Creative are all guilty of paying the NBC contributor $15,000 to praise their products.

A report in the Wall Street Journal disclosed that Greenberg was under contract with these companies.

Considered "an authority on consumer products", Greenberg has appeared on a number of US TV programmes. According to Washington Post: "Since December, he has discussed Sony's ImageStation digital photo site on WNBC's Today in New York and Fox's Arizona Morning; Sony's DSC-H1 camera on Good Day Dallas, Today in St. Louis and News Daybreak in Austin; Energizer E{+2} Lithium batteries on Fox's Morning News at Seven in North Carolina; Sony's Cyber-shot camera on Fox's Houston station, and Hewlett-Packard's Digital Entertainment System on Today."