
Using data from the Audioscrobbler API and Amazon, tuneglue can visualize webs of relationships around any artist in Last.fm’s data catalog.
GeoPlanet Explorer, a tool for browsing the Yahoo! geolocation hierarchical database, GeoPlanet.
The tool queries Yahoo’s GeoPlanet API for a WOEID of a “place,” which is Yahoo’s clever method of uniquely identifying any “location of interest” in the world, with something more loose yet more descriptive than just a lat/long. Passing a WOEID to the API returns lists of locations spatially-related to your search, like parent/child/sibling places and historical “ancestor” records.
The developer used YQL, YUI, and Yahoo Maps to put it all together. Check out the source code on Github for the full experience.
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.
For the first birthday of World of Goo, 2D Boy put the game on sale with one of them “name your own price” deals.
The results were interesting. They made a lot of money for a year old game, and they deserve all of it.

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)
A repository of items set up in a relational database form. Includes events, people, photos, equipment, countries, etc. Doesn’t seem like it’s structured like a wiki, at least not right now.
(mefi)
Andy Baio from Waxy.org uses Amazon’s Mechanical Turk service to analyze data about the sample’s used in Girl Talk’s album Feed the Animals.
You can download GT’s album here, and choose whether to pay or not to pay.

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.