FranticFish - 7:37 am on Jul 14, 2011 (gmt 0)
Some of them you could still fill out a contact form, but once you submitted it, you get a page not found error.
I've sometimes still had success after this by chasing the admin contact for the domain (admittedly many times this info is hidden).
Whenever I can now I get a phone number. Sometimes I've managed to get name and number from the designer / webmaster - or get a message relayed through them.
Response rates via phone are so much better than via email.