Like Fango said, pictures of panties alone probably would not fly here. That said, I have seen decent posts on other sites where the contributor posts a full, normal picture of a woman and describes how he (or she knows her) and then posts photos of her panties. It would look something like this:
My wife's best friend from college visited with us this weekend. She travels for a big pharma company as a sales rep. She's married & divorced, no kids, and appears to have a lot of fun. She's in her mid thirties and she's in great shape. Here's a picture of her with my wife (she's on the right). I snapped a photo of her used thong when she was in the shower.
Now, there are a few potential problems with this type of post:
1. People post panties that have been ABUSED and are covered in all kinds of nastiness.
2. People post pictures of themselves parading around in the panties and then unloading on them.
3. People post pictures of females that are not of an appropriate age.
At the end of the day, I agree with
Fango, the problems outweigh the benefits and the threads get canned. These threads are probably not appropriate here. But I thought it might be helpful to post something that I think is in reasonably good taste that might generate some interest.