Yeah, I like the Launchpads. I ported Contiki to them, and wrote some stuff for eg low-power wireless networking. Unfortunately had to rip out stuff like uIP. Check this post for an in-depth write-up of a low-power radio duty cycling protocol, with lots of measurements etc. http://www.bithappens.se/blog/2013/05/26/simple-yet-efficien...

For those not interested in Contiki, late in the post there are some power consumption measurements that illustrate rather clearly why switching off the 60 mW radio as much as possible is a must as soon as you go battery.

You can find the Contiki-port at https://github.com/msloth/contiki-launchpad