So we have the ultimate photo thread, video thread, movie thread, and Grid Girl thread (which doesn't contain the word "ultimate" in the title, but it's implicit, right?).
How about an Ultimate Web Site thread? Besides Pelican, which sites do you visit frequently, for reference, entertainment, or whatever reason?
Here are a few that I like:
Virtual Machine shop (information)
http://www.jjjtrain.com/vms/
IT business news:
http://theregister.co.uk
LEDs and automotive lighting:
http://hidplanet.com
Audio/Video:
http://videohelp.com
http://avsforum.com