Using Camera Blur (or Frischluft LensCare), you can create bokeh effects pretty easily.
But I notice real bokeh can have distortion as you move away from the centrer of the lens. Sometimes it compresses into a "lemon" shape along the edges.
The only thing I can think of is Particular/Form and a custom bokeh shaped particle emited from layer brightness? And maybe a radial gradient driving rotation?
Any other thoughts how to do this?
I have developed a few techniques during my lens flare research.... Transposing them to Bokeh simulation would be possible, but still kinda tricky... I don't think a simple particle setup will look convincing...