The brilliant folks at Zinio Labs is bringing magazines to your iPhone or iPod Touch browser. They have shrunk popular magazines into mobile format allowing you to browser through page by page and zoom in to read or "look" at the contents. As title suggested, Playboy is amongst many titles they have to offer. Simply point your mobile Safari to http://zinio.com/iphone and enjoy! (Thanks Toby, for sharing this one)
Other popular titles includes: Penthouse
US News and World Report
In other news, I just learned Playboy.com has an iPhone-friendly page. Uh, the things I make myself do in the name of research for "the mobile experience".