Thanks yngvie and arimane. 69ron's experiments are what gave me the inspiration to try this out. Like he and you pointed out, the seeds are much more uniform and dependable in their concentrations than any other parts of the plant.
I found Datura metel on my trip and started at one seed, doubling the dose each night until eight seeds, thereafter I took ten. The dreams were of the ultra-intense variety, often so that I would only realize later the next day that it was memories of dreams running through my mind, not physical experience! The subject matter was quite different from usual dreams and they were always extremely lucid, 100% believable at the time (and even once conscious as I said). Unfortunately this species seems to have had a slight limiting effect on dream recall however.
I think I will order some D. inoxia seeds to grow them and use them seeds intermittently as dream enhancer and psychedelic potentiators.
The seed flavour is quite nice actually, reminiscent of mild bell pepper seeds (shaped similarly too). What has been your experience arimane?