@Javi: If you need only a bunch of them, why would you want to manufacture your own PCBs?
In fact Duane spotted something (a selling point) that I'd missed -- I thought that our proto-shields might be useful in an educational role because they woudl allow multiple students to share one Arduino.
Duane noted that he often has multiple projects on the go, and that it's a pain swapping things in and out, to the extent that in the past he's bought additional Arduinos (as have I), and that it would be easier to build different projects on different proto-shields and then just swap them in and out on the Arduino...
Replay available now: A handful of emerging network technologies are competing to be the preferred wide-area connection for the Internet of Things. All claim lower costs and power use than cellular but none have wide deployment yet. Listen in as proponents of leading contenders make their case to be the metro or national IoT network of the future. Rick Merritt, EE Times Silicon Valley Bureau Chief, moderators this discussion. Join in and ask his guests questions.