RDTN.org is building a network of radiation detectors throughout Japan, Southeast Asia, and eventually around the world, to make real-time radiation monitoring possible by anyone, anywhere – without having to rely on governments or companies. It’s a Kickstarter campaign, and you can help make it happen. Please check out the project page and consider making a contribution. We will all benefit from this.
(This is not my project, though I know some of the organizers, and will be helping out as much as I can.)