Happy Halloween everyone. We've got lots of tech treats for you, starting with something called The Global Network Initiative, which has been signed on to by the likes of Yahoo, Google and Microsoft. Then, what is "clean" coal, and when will it be commercially available? Also, some new scientific studies of tsunamis, and an update on a project called Ushahidi. We end with a segment on low-cost solutions to disease diagnosis in the developing world.

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