imho there would be less talk, more results if more pd'ers would volunteer fior trials, etc. even painless genetic testing/disease monitoring trials.
i've read 30% of trials never occur thru lack of volunteers and 80% are seriously delayed.

as far as finding a disease altering treatment, ceregene's results expected in march/april, they are initiating fetal brain cell transplants in europe, there's a porcine implant trial just started in new zealand, other gene therapy trials in progress/planned, etc.

i suggest checking the mjff blog daily.