They create video shorts, email updates and current travel calendars. Some of the former porn stars will normally have links to their clips on various other sites as well. If you're really lucky they'll even have current rates posted...

Back in DC Jessie Yum Yum used to have a quite elaborate site but has since become a Nuru specialist so focuses on that now.
My personal favorite is Zasu Knight. Especially since I "donated" a few items for her.
http://planetzasu.com/wp/?page_id=53
So Ladies and Gents... is there a favorite site you've visited?