There are presently slightly under 1.5 billion PCs connected to the Internet, and just over 1 billion net-enabled phones. Mike Nelson (former director of Internet Technology at IBM, the former director of Technology Policy with the FCC, and a professor at Georgetown’s Communications, Culture & Technology program) estimates that as we move from an “internet of PCs” to an Internet of Things, that there will be roughly 100 billion net-enabled devices within the next 5-10 years.

More on this in Hammersmith’s upcoming Networked Objects and The Internet of Things report.

According to the Gartner Group, “By year end 2012, physical sensors will create 20% of non-video internet traffic … The extent and diversity of real-time environmental sensing is growing rapidly as our ability to act on and interpret the growing volumes of data to capture valuable information increases.”