(pieces of the article)
The initial Geiger counters used in the project were from the Reuseum, an Idaho business that recycles old technology to new homes.
The project began as a way to collect and distribute more-recent radiation information than the government was releasing, in an effort to keep Tokyo residents calm. On March 13, just a day after the explosions at Fukushima, Tokyo Hackerspace was working on getting its own radiation data. The government took almost a week to begin releasing public radiation data, and even then the data was sporadic.
Thanks to those posting to the InSTEDD Twitter feed.