I always got the impression most tech conferences were too thin-skinned about the subject, which is sad considering the porn industry works on a lot of interesting tech problems.
There was one talk called "Tits Bits" at the Chaos Communication Camp 07 (a rather unconventional but awesome tech conference). It was about the technical challenges of operating a porn streaming website. You can download the recording (number 2041) here: http://dewy.fem.tu-ilmenau.de/CCC/CCCamp07/video/m4v/
The recording includes some pictures which make it not safe for work (depending on your work environment).
