I came across The Hall of Documentation Weirdness again recently, a great site by a Vancouver writer called Darren Barefoot. It features unintentionally hilarious technical illustrations from around the world, made all the more humorous by Barefoot's quizzical captions.
The site has been around for a few years now, and it's as good as ever, although I notice that it now includes some ads. (I remember its popularity spiked back in 2002 or 2003 when it got slashdotted: Barefoot was probably inundated with offers that he could not refuse.)
Anyway, it's wonderful; you must check it out. Here's a teaser:
"From a Dell computer box. I believe the caption should read 'If you drop this box on a dog, don't trip over its tail'."