I believe you mentioned you are looking for samples of network site designs, so i'm only gonna post relevant samples :
--
http://realitysites.com/index.html?cf=1
--
http://crazyfetishpass.com/main/ (this one is more of a conventional multipass/network site)
For more samples, please take a look at our portfolio
http://www.insaneadultcreations.com
Contact details below