Other collections I enjoy looking at and links I find interesting. If anyone I've listed doesn't want to be linked to send me an email and I'll remove your link.
Cels:
Al & Nic's Cel Carnival - likes Venus Wars and has a large collection of Robot Carnival cels
The Anime Effect - A collection comprised of 1980-90s sex and violence!
Dragonfly Entertainment - Dennis J. Woodyard's website. He works on cartoons; sells flip books, cels, and other collectables.
H's cel Gallery - Collects a lot of Curse of the undead Yoma and Genocyber cels
Jerry's Anime Cel Page - a lot of cels, a lot of shows, now only seen through the wayback machine: http://web.archive.org/web/20030408071455/www.geocities.com/Tokyo/Fuji/5254/HTML/Cels.html
Professor Atomo's Cel Gallery - Great cels from great shows
Shadows on White - Collects a lot of Samurai Troopers/Ronin Warriors, and B't X cels.
Art:
John August Swanson