Museum of Online Museums

Blogs and webpages are more often than not catalogs of personal obsessions. Chicago's Coudal Partners saw these collections as online museums, and created their own curated page with some of the best collections on the web in their 'permanent catalog'. They include collections of peach box labels, cold war fallout calculators, Russian book jackets, and other equally random groups, all of them pretty quality. 

As a warning it's a big time sink but definitely recommended. 

MoOM