Correct, I worked hard on that new version and I thought a lot before finding the idea of that demo to show what you can do with maptimize.
I really like that tweet demo. You can find a lot of interesting information, like tweets in your area as you said.
The heatmap is also interesting when you need to analyze huge amount of data like this.
You can also see where twitter is very active. I was surprised to see that Indonesia is very active.