Interesting. They appear to be using a software USB-serial implementation on an ATtiny; last time I checked that didn't work on some OSes because CDC serial on a USB low-speed device violated the USB spec.

It's sort of surprising to me how many of these kinds of things there are out there that are apparently successful. I guess the key is that they make it accessible to a wider audience by making it Arduino compatible so you don't need to be a full on EE to make use of it like you might if you bought a raw Atmel AVR chip off digi-key or something like that.

Not that you need to be an EE when the devices are integrated this much and vendors provide reference implementations but it is worth the money to get a decently built PCB quickly instead of doing it yourself.

For those who are interested, there is also another one called Femtoduino, very small too: http://www.femtoduino.com/

It is not clear what they mean by "Mobile Development Ready". Does that mean I can use it with a 3G radio? If so how?

From the Kickstarter page:

> With Bluetooth Classic, BLE, and Wi-Fi shields and examples for Android and iPhone - and USB Serial (built-in) connectivity for Android (devices with USB OTG supporting Serial devices) .

Funny how those wireless "shields" have 10x performance of the AVRs on the main board.