Heides Jokers - Amazing collection organized across 5 pages. Particularly cool are the oldies and hand painted.
Jesters Planet. Oddly stored at Kaboodle.
Dot Pattern Collecting Site - Joker Page - 22 Joker collections. Not updated since ...2005?
Little Joker (Spanish)
Sezgi's Joker Blog
If you'd like to be mentioned, comment here and I'll approve it. I would appreciate it if you would also mention my little collection.