Shoot me an email we have a custom php/mysql driven solution that we're currently looking to start reselling, ryan @ redbagproductions.com im actually heading out for the night right now but will def be in touch with you tomorrow morning.
We're running around 200 paysites on a single installation and it handles pics, movies, text and feeds and it is unencoded
Its not 'pretty' in the sense of the administration area but it does what it is supposed to and we're looking at a one-time price point of around $300-$500 and you can use it on unlimited paysites with a single install.