Recently the private resort photo sessions have gone through a change of sorts. According to the lady I talked to at Disney's Fine Arts Photography they are all being handled through them now and no longer through Photopass. I sought out this info when a person on another forum/website was asking where the Photopass desk/kiosk at the Wilderness Lodge had disappeared to.
Basically, they're offering 2 different options:
The mini-shoot is $150 for a 20 minute photo shoot at 1 of 4 deluxe resorts: Animal Kingdom Lodge, Polynesian, Grand Floridian, or Beach Club. Included in your $150 is all untouched/unedited images on a cd with copyright release.
The enhanced shoot is $350 for an hour long photo shoot with a photographer and assistant virtually anywhere on Disney property. Yes, this includes the parks. All images are edited/retouched and you get a 6x6 proof book. It's not on the website, but I have verified that for an additional $50 you can purchase all your edited/retouched images on a cd w/copyright release.
Here's a link to a thread with some discussion.
Here's a link to Disney's Fine Arts Photography with examples, tips, etc.
Hope that helps with your decision. Of the resort choices my vote goes to the Poly just because it's so lush and pretty.