From Movies.ie:

Q: I assume you're still sticking to your policy of no nudity in the film? I heard you picked out your own body double for Nailed.

JB: "Yeah I did pick out my own body double. That was bizarre, that was very bizarre. It's very hard to be a woman and sort of be looking at women kind of like they're just objects. I was like, ‘I'm kind of having a male experience right now.' It was weird. It wasn't the best thing I've ever done. Anyway, I actually didn't stick to that policy in this other film I did called Powder Blue.

Q: Where you played a stripper?

JB: "Yeah, I mean you change and you grow up and one moment it's right and another moment it's not right. I just take it project by project. It's all about what makes sense for the character and what makes sense for me."

http://www.movies.ie/html/article.aspx?articleid=3448

The extent of the nudity is not mentioned unfortunately but it is still great news. Powder Blue screens for potential buyers at the American Film Market in a couple days.