Thankfully, The Daily Show covered the issue in their inimitable style. Jon Stewart explained from which magazines Ford was pulling their ads, "The publications include The Advocate and OUT. Not affected are Mandate, Honcho, Black Inches, Latin Inches , Torso, Blueboy, Playguy, All Man, and of course, Gaywad McGee's Scrotum Lovers Quarterly."
"Actually, umm, I umm, I should add that last one's really more of a trade magazine, for connossieurs of scrotums."
Thanks Jon & Company, you make me laugh about something that previously sent my blood pressure North. Crooks & Liars has video for the whole segment.
I debated whether to actually provide links to all the porn mags, but it was so easy - almost every one was the top hit on Google, not that Black Inches was a big surprise - and figured the cheap thrill trumped good taste. They're all kinda safe for work, depending on how your boss feels about your computer displaying a naked guy with a big yellow words obscuring his crotch.
UPDATE: As Americablog reports, Ford backed off on pulling it's ads and even stated that they would tailor them for gay consumers (I assume that means attractive homo couples sitting it their cars).