Belle,
My DH wanted to send this your way (he loves charts):
Here�s a link to some posters � they are a bit esoteric, but then that�s the idea, isn�t it?
http://www.edwardtufte.com/tufte/posters
http://www.edwardtufte.com/tufte/posters

The �Books� link points to some books that are about how to present information visually (so there is a lot of information presented visually in them).