i was sure overwhelmed right after my PDC. so i checked into opportunities to take further training or to intern with experienced designers. here are some highlights:
my teacher, jesse lemieux, highly recommends milkwood farm in new south wales, australia. of course, australia has wonderful diversity from their drylands and the sub-tropical areas. milkwood offers ongoing courses and they also have internship opportunities. they have a great blog i've found to be very informative!
http://milkwoodpermaculture.com.au/courses
http://milkwood.net/
the bullocks brothers in the state of washington in the USA are a wonderful example of temperate (rain forest) zone permaculture and offer internship positions most years.
http://www.permacultureportal.com
for further training and internship opportunities, you can contact zaytuna farm and geoff lawton at pri australia
http://permaculture.org.au
so far, i've decided to spend the money and time on experimenting on our property but i'm keeping my options open!!
let me know if you would recommend other places.