Smart city, smart planet: Sensity is creating a billion-node network of global sensors — in street lights

There are over four billion street lights in the world. Almost all of them are high-intensity discharge lights that use mercury vapor or some other toxic substance to create light. All of them are powered, and most burn out every two years.
Now what if all these could become nodes on a sensor network spanning the entire globe?

SaaS doesn’t mean what you think it means

Talk about agile development, technology acronyms may be the most nimble creations of the tech sector to date. From SaaS (software as a service) to PaaS (platform as a service), to IaaS (infrastructure as a service), what are we supposed to make from all of this? And is the acronym already obsolete?