Just added this one teen program, which got amazing teen paysites, but only a few people work with it. Though it could bet many oversaturated programs.
There're 2 flagship sites like Nubiles:
8Teenies &
Your18. Both of them are charged with tons of niched content, but the second one is more hardcore. There are also tons of pics and vids fhg and em flash videos as well.
Also they got some nice solo sites:
Flexi Becky
Nastya 18
Anja 18
Camile 18
And a few others:
Casting Bang
Bad Girl Mag
Here you'll find the program itself.
Good Luck!