We're hearing that Tom Foster, editor of Men's Journal, has resigned, citing irreconcilable differences with Jann Wenner. He'll be out of the office by 1 p.m. today. A tipster speculates:

It's most likely a forced resignation, as Foster was dismissed at Men's Health from his the number seven slot (about nine months into it) shortly before being giving the top job at Men's Journal. Rumor says Jim Kaminsky, former editor at Playboy, will take over Foster's role at least until Jann has another change of heart. Again.

Update: Foster's goodbye note:

Thanks for everything. I can't tell you how proud I am of all that we've accomplished, and how much I've enjoyed working with each of you. I truly hope I get the chance to work with each of you again. Please stay in touch — you can reach me at [redacted].

Good luck!