I ...ahem... "accidentally" stumbled on a whole series of these a couple weeks ago. The ones I saw trailers for were "Not Three's Company XXX", "Not Bewitched XXX" and two... episodes? of "Not The Brady Bunch XXX". None of the trailers were this clean.
Hey Hurf,
Calling to say that they made "The Dirty Facts of Life" and it was covered on(of all things) Entertainment Tonight.
here's the IMDB page:
http://www.imdb.com/title/tt1355189/
and here's a clip from Entertainment Tonight with the cast(even though the address sounds NSFW it's OK, no porno dominating the page):
http://dirtyfactsoflife.blogspot.com/