Ive been reading the Getting Started with the Internet of Things as I learned to use the Netduinos. They are really great, the minis are super small and the Netduino Plus has the Cat-5 Jack, so it has simple web interaction basically built in. I say “simple” because if you understand some of what HTTP is, and think about this as a micro device, this becomes powerful.
Right now I have the Netduino set to send an HTTP PUT to my Pachube.com feed. Pachube is a simple service setup for microcontrollers. Its a great free service (as long as your posts dont happen faster than their reasonable 12 second limit) as well having a decent API, it can even post to Twitter. I set up the feed in basically 1 minute, and it only has 2 parts: humidity and the temperature.
You can see the feed in full here: Pachube.com Feed 50487