Easiest way to create a dynamic heatmap of the United States

Question

thanks for all the help the last few days. I'm hoping someone knows this one.

I'm looking to dynamically create a heatmap of data based on user input, then color certain states based on the response. Like a poll for voting, for example. I'd like to do something like this... http://www.trulia.com/home_prices/

What is going to be the easiest way to do this?

Answer 1

The Google Chart API also offers maps.

Here's a (completely made up) example: