A visualisation about visualisation styles in the form of the periodic table (thanks for the reminder John).

[click on picture for interactive table]
If you are a fan charts:

A visualisation creation tool from Many Eyes.
With GMapCreator you can map thematic data onto Google Maps (good link Seraphim).
US demographics visualizer
A short piece about information
[if you like the style of presentation see this previous post on kinetic typography]
Some examples/ideas
Nine ways to visualise consumption as found on Flowing Data
Many mind maps.