Actually, I tried that a long while ago (just fooling around with it), it didn't work as well as I hoped, but I did get a mix smelling something like phenylacetone (and a whole bunch of black crap in the distilling flask), I should go at that again... it might be the only way for bees of the future to produce meth. It is a very involved method, but it is quite easy and all ingredients are easy to find OTC (the limiting reagent being the ephedrine).
Rhod, do you have that linked on your site?