Here’s a cool article about the Pinball Hall of Fame on the Joystiq site.

http://www.joystiq.com/2009/02/06/joystiq-visits-the-pinball-hall-of-fame/

There was an old video game museum in St. Louis.
It closed a number of years ago, but information has been preserved on my coinop.org website:

http://www.coinop.org/features/coinopmuseum/

There was also a great traveling musuem of older video games called Videotopia, though it looks like they haven’t been doing much since 2003.

http://www.videotopia.com/