Below is a list of adult entertainment industry employment / networking websites & forums.

Xbiz.net
(a "myspace" of adult entertainment industry professionals)

OneModelPlace
(a website for mainstream & adult modeling/acting work)

Adult Staffing
(Adult employment opportunities are regularly posted here)

Sexy Jobs
(not many new postings too regularly, but you can submit a profile very easily)

Glamour Models.com
(a forum for glamour & adult models to connect with photographers & clients)

HardcoreModeling
(not an overly trafficed site but worth a try)

Xpeeps
(more for social networking but there are job opportunities here and there on the site)