The British Hang Gliding and Paragliding Association (BHPA) The BHPFC is affiliated to them
The Royal Aeronautical Society Human Powered flying Group. They have run the Icarus cup
Prop Designer A source of information on human powered aeroplanes.
Human powered Flying by Chris Roper.
Aircraft Aerodynamic Design: Geometry and Optimization by Dr Alex Forrester and András Sóbester
Dash Pa A blog about the construction of a HPA.
A blog about Airglow
An article on Airglow
Some youtube videos