Yep. I had a set bought back in 2004, it was published on the front page of the site in 2005. Ironically, I had no tattoos at that point, just a ring in my lip and ear. There are actually quite a few non-tattooed girls there.
As far as nudity, the requirements have always been boobs and ass shown, preferably by the 10th picture in the set. Anything further is up to the comfort level of the model, but they prefer no 'gyno' shots. (Closeups, spreadshots)
The photography quality requirements are what have gone up. It used to be that you could take a set in a messy bathroom with a 2 megapixel camera and get accepted. My set wouldn't be accepted nowadays by the standards, but I love it for its simplicity. Mine was taken in my dorm room with a sheet for a background, haha.
There are huge discussions and groups dedicated to helping hopeful girls learn how to get the lighting just right, poses and expressions down, suggestions on backgrounds and locations. Its a lot of work nowadays to put a set together that is up to standards without hiring a very professional photographer.
Its amazing how much the place has grown since I've been around. They've got books out, a burlesque tour, featured on CSI and in several music videos, and they're launching a comic book collaboration this year at ComicCon, so there will be tons of the girls around there, and lots of other top secret projects that will really launch them into mainstream. Its a huge business now whereas when I joined it was a small website.