I don't think not programming for Contiki disqualifies you from commenting on its use. Anything about the (user perspective!) differences between 1.x and 2.x, using the UI or the browser, response to your server/site, etc, would be fun to hear.

I thought I read once that you can run Contiki as a process under Unix. Not sure though. If true, that might be a good way to get some exposure to it.