This one was made recently.
For a low budget film, it wasn't terrible.
http://www.youtube.com/watch?v=35HBFeB4jYg
There is also an upcoming one which you can view the teaser for here.
https://www.youtube.com/watch?featur...&v=-OQxxO9YuKg
and.....it has been said that the MarbleHornets series is going to get a big screen film adaptation in the near future, so it should be a good year for slenderfans.