Here are some useful links from all over the interwebs.

Introduction to permaculture

• Introduction to Permaculture Course
• Wikipedia entry on permaculture
• David Holmgren’s permaculture flower
• Permaculture search on Delicious.com

Permaculture projects in Maine

• Humustacia Permaculture Gardens
• Newforest Institute
• Avena Botanicals
• Portland Maine Permaculture

Primitive Skills and Natural History in Maine

• Maine Primitive Skills School
• Delta Institute of Natural History

Periodicals

• Permaculture Activist Magazine
• Permaculture magazine UK
• Agroforestry news here or here

Gardening

• Maine Home Garden News from University of Maine Cooperative Extension
• Edible Forest Gardening

Plant Resources

• Fedco Seeds and Trees in Waterville, ME
• One Green World in Molalla, OR
• St. Lawrence Nurseries in Potsdam, NY

Water

• Aqueous Solutions Resources page
• Greywater irrigation – grey waste treatment
• Oasis Design: Grey Water Books, Ecological Design 

Videos

• Permascience’s Channel
  

Energy Descent & Afterculture

• Future Scenarios – Introduction
  

Discussion Forums

• Portland Permaculture meetup