Crafting with your Hands: All About Weaving - an excellent resource for beginners that covers everything from loom types to videos on how to weave to terminology and textile organizations.
eLoomaNation - history, use and patterns for Weave-It and related looms
Handweaving.net - incredible treasure trove of weaving drafts, weaving books and textile references all available for free download
Liz Wagner's "How to Weave" videos - detailed set of 10 minute weaving instructional videos
Norwich Textiles - The web-site has been created as part of the Norwich Textiles project, a collaboration of Norfolk Museums & Archaeology Service and Norwich School of Art and Design.
Paula Burch's All about Hand Dyeing - piles of dyeing information from beginning to technical
Pictionary - a very comprehensive list of weaving structures that is hyper-linked to an illustrated description in pdf format [from Marcy Petrini]
weavershand - Tablet Weaving, Kumihimo, and Ply-splitting resources
Weavzine - Online weaving magazine. It is no longer updated, but the articles are an excellent resource.
DIY dye catcher - How to create your own dye catchers