This is the best example of a SNIU I’ve seen in a while:
The Open Tsunami Alert System (OTAS) is being developed by developer Charles R. Martin and Canadian earth scientist Darren Griffith. The current plan is for OTAS to be a distributed network architecture composed of two classes of nodes:
(1) prediction nodes, which receive data feeds from seismological and geophysical data sources and produce alert messages.
(2) service nodes that display or propagate the predictions to peers.
Also, the entire network will be buildable with the sort of small PC machines that are “cast offs” in first-world countries.
The system will allow many different means for delivering the actual alerts: for example, email, telephone alerts, and SMS messages.
More info at: http://otasblog.blogspot.com/
Peer-to-peer networks can do amazing things and have unimaginably cool applications so long as we don’t let the music and movie industry kill them off before we even find out about these uses. Find out about more SNIU here. via Cringely

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