Fresh from his puppy dog-esque, “Oprah” interview, Facebook founder and CEO Mark Zuckerberg made good use of the press the television talk show appearance engendered to hawk his wares, most especially new features the hot social networking-site has been coming out with of late.

Including some that look suspiciously like Twitter, the hot microblogging service that has hip-checked Facebook out as the new “in” thing in Silicon Valley and which declined Zuckerberg’s acquisition attempt last year.

But what tool did the ever-clever Zuckerberg also use yesterday to flack his products?

Twitter, of course!

Imitation is, of course, the sincerest form of flattery. But the posting by him (finkd) and also PR honchette Brandee Barker (facebookbrandee) does give new meaning to the word: coopetition.

Here are Zuckerberg’s and Barker’s tweets today, as well as part of the Oprah Winfrey interview–well, more a lovefest for the tie-wearing (please stop taking him shopping, Brandee!) and unusually loquacious Zuckerberg–below: