We told you this summer about Seth Godin's pre-publication audience-building for his latest book, Tribes; last month, once the book had finally come out, Godin conducted an exclusive presentation for fans who had expressed early interest (many of them pre-ordering the book) at the TimesCenter in midtown Manhattan. He invited audience members to record the proceedings and post them online to help spread the word, Mixergy.com offers a streaming video as well as an MP3 for download. The camerawork is a bit shaky in spots, but serviceable.

(Godin has also put his presentation slides on Slideshare.)