Collecting
Club Hasselblad - http://www.clubhasselblad.com/
Photography and camera collecting club. Has a forum, pictures and links to other sites.
Dream Chrono Watch Blog - http://blog.dreamchrono.com
Blog dedicated to fine watches with comprehensive watch collecting guide, in-depth watch reviews, rare and vintage watches buyer's guide.
Sands Mechanical Museum - http://www.sandsmuseum.com/
A virtual museum that displays coin operated games and pinball machines through the years.
The Collective Detective - http://www.cdetective.com/index.htm
Aimed at private collectors and dealers. Allows users to showcase their collection and find items through the site.