I think these guys have a great model.
http://www.fyretv.com/how_it_works
And here are some interesting membership site models.
http://staggstreet.com/join.html
$4.95 for 4 days (trial) then 15.00 recurring every 30 days
$15.00 for 30 days then 15.00 recurring every 30 days
$38.00 for 90 days then 38.00 recurring every 90 days (best deal!!!)
$80.00 for 180 days (non-recurring)
http://www.cinemaerotique.com/join_main.html
$30 a month and only $10 ever two months
$40 a month non-recurring
$50 for 3 months non-recurring
$70 for 6 months non-recurring
$90 for a full year non-recurring