I know this place has a fair few Psycho-fans, so I thought I'd bring this to their attention. Doublefine have put up a wiki for the game. There's not much content yet, but all the character pages have links to their myspace pages. For those who don't know, Tim Schafer created pages for each character as a way of working out their personalities and inter-relationships. Some of the characters are revealed more in the pages than they were in the game. Example: Milka's obsession with invisibility is explained. Also, Clem and Crystal continue to scare the pants off me.
http://www.doublefine.com/news.php/Psycho-pedia