Visualizing app development and code commits on Twitter using code_swarm.
Code and document changes are represented as points swirling around the users making the changes and repository commits. Makes boring version control look really cool.
The Eclipse IDE project has a really active community.

A NYT visualization of most-queued films by US zip code. A cool example of what can be done with 100% free data. The queue data is accessible through Netflix’s API and zip code boundaries from the US Census.
Isometric visualizer for Dwarf Fortress.
If you’ve seen the complexity of the Dwarf Fortress simulation, you’ll appreciate how insane this is.

The Twitterverse v0.9 by @BrianSolis
It’s my dream/goal to create something someday that spawns a whole economy of sites/businesses around it.
Beautiful and inspired.

Visualizing the US power grid.
A neat data viz map of the US that allows you to see major power line arteries, types of power plants and their locations, and what source the power comes from in your area. There are even layers that show solar and wind power, and where those are most effective.
Looks like Florida is powered by:
13% of Florida energy comes from three nuclear facilities: Crystal River, Turkey Point, and St. Lucie. That’s pretty impressive. Nuclear power provides 48% of Illinois’ energy, and a whopping 71% of Vermont’s. It’s also interesting to see how important hydro power is to the Pacific Northwest, mostly sourced from the Grand Coulee and Chief Joseph dams on the Columbia River.
(benfry)

Google is producing a map showing results from the New Hampshire primary with their “My Maps” feature. They’ve already done one for the Iowa Caucus.