(July 13) Whole Foods Markets Inc. chief executive officer John Mackey frequently, and candidly, posts on his company’s Web site, keeping the public up-to-date about the company’s business, including the pending merger with Boulder, Colo.-based Wild Oats Market.

It turns out this hasn’t been Mackey’s only foray into the blogosphere.

According to a Washington Post article that cited Federal Trade Commission documents, Mackey has been posting under a pseudonym, “rahodeb”— an acronym for Deborah, his wife’s name — for the past seven years on financial and stock market-related message boards hosted by Yahoo! Inc., Sunnyvale Calif.

Mackey reportedly posted more than 1,000 times, often about his Austin, Texas-based company and its rival Wild Oats.

Whole Foods announced plans to buy the company for an estimated $670 million in February. The FTC sued to block the merger in June.

Mackey’s anonymous posts stopped in 2006, before the merger announcement, and he has not been accused of wrongdoing.

It’s unclear if the posts would affect the outcome of a hearing scheduled July 31 and Aug. 1 in Washington, D.C., to decide whether to grant the FTC’s request for an injunction to block the merger.

“I don’t think it’s really a big deal,” said retail analyst David Livingston of DJL Research, Pewaukee, Wis. “He’s not the only one out there doing it.”