I am constantly on the lookout for new bookmarking sites. There doesn’t seem to be a definitive list which is constantly updated, so I grabbed as many of the lists as possible and ranked them in order of freshness. It should be a good source of bookmarking sites although there is going to be obvious duplication.
233 Social Networking Sites for Marketing Your Blog
September 30th, 2007
PHP example of how to integrate social bookmarking sites in your website
12 September 2007
Social Bookmarking List over 120 sites with Page Rank
August 27, 2007
SOCIAL BOOKMARKING: 50+ Social Bookmarking Sites
April 23rd, 2007
Your bookmarks should go wherever you go. Here’s a list of social bookmarking websites.
Social Bookmarking Site List (over 150), Tools, & Podcast, with PR
May 22, 2007
The Big Boys of Social Bookmarking – The Top 24 Sites
May 15 2007
The Social Bookmarking Faceoff
September 18, 2006
55 Social Bookmarking Sites to Promote Your Blog Articles
May 25th, 2006
Social Bookmarking Galore!
August 16th 2005
Free Bookmark Managers