Yahoo! Groups: AssemblageArtists 
A forum for artists interested in exploring assemblage. The members of this group will exchange information, ideas and techniques for creating the assemblage art form.
http://groups.yahoo.com/group/AssemblageArtists/The Zymoglyphic Museum 
Contains art, artifacts, and natural history from the Zymoglyphic culture, whose creative output relies mainly on the assemblage of natural objects.
http://www.zymoglyphic.org
Art Erratica 
Group of artists who share a unique vision and a dedication to work that is meaningful, innovative, and of course, erratic. Our work tends to be out of the mainstream, a bit off-center, odd, or funky.
http://gallery.passion4art.com/members/arterratica
Yahoo! Groups: AssemblageArt 
For established or emerging assemblage artist or even interested in theoretical or art historical discussion of assemblage art. Critiques, discussion, marketing, methods, materials are all topics which many may be interested in exploring.
http://groups.yahoo.com/group/AssemblageArt/
Tribe: Altered Books 
Group for those obsessed with altering books, collage and Antiquarian Art. All things paper and pulp including textiles.
http://alteredbooks.tribe.net/
Folk Art Findings Assemblage Art 
A delightful collection of assemblages from nature, natural objects and personal memorabilia.
http://www.pressed-flower.com/artist/stuart-v/