Finally - a really cool use for your Raven boards ;-)
Atmel, Cisco, and SICS have been working together for the past months to bring the ability to run Internet Protocol over the Atmel Raven boards. You can read the official press release on Atmel's site among others.
You can see some more information right off of the Contiki Website.
Get the release at http://www.sics.se/contiki/news/...
Check out a video of it all working together at www.youtube.com/watch?v=yjztYx_F2Ko
Get the tutorial too for a great overview!
Currently the tutorial is written to work with the JTAG MK-II. If you don't have one there should be ways around using one, as it's just for programming! More on all that to come...