Drew, I'm sorry but with the current shader this isn't possible. The 2 DoF shaders are just fake DoF shaders (well in it's initial stage they were real dof shaders...). For a real DoF shader you need a depthmap of the scene. When I started converting the shaders I didn't know that and just did my best to archive some kind of DoF. However, I have learnt a lot about shaders in the past few days and I'm already doing a new DoF shader which uses a depthmap and will result in real DoF.
In other news, I finished a thermal, a posterize- and a toonshader. Also HDR is on it's way

posterize (you can change the strenght by altering a var. This results in more or less different colors per surface):


toon:


thermal: i always get a blue screen (no not an error screen ^^) when trying to make a screenshot, dunno why this is happening