Marianna Palka wrote, directed, starred in and produced Good Dick a dramatic competition selection at the 2008 Sundance Film Festival. I was really impressed with the film which also stars Jason Ritter and think Palka is definitely a screenwriter/director to watch. Here's an interview with her from the Sundance site...-JG
Use this link to watch it:
http://www.zoom-in.com/media/video/drupal/spotlights/sundance/2008/gooddick.swf