Yay! Thanks for pointing out TV 50 there, some great stills on that site. I've been there before, but I think I went straight to the video section as that's what I was looking for at the time, more than just pics.
One of my favorites is TV and Radio Bits, which has some Radio Times schedules typed up. Reading them is a really good way to get yourself into a nostalgic mood.
And don't forget TV Fetish, which has lots of pics and info. My own site is down at the moment, I don't know why as I can't get hold of the guy who owns the server at the moment, but I hope to be back up and running soon.