Mood Tap is a fantastic idea, and a very excellent FireFox addon. Unfortunately, the project, and especially the addon, seems to be long dead. Still, the extension taps into the site to render the mood of the world in the corner of your browser, and let you communicate your own mood back into the system. Nice!

Of course, best would be to see this on a little RGB-illuminated toy globe on your bookshelf.

I have been thinking for some time of a keychain device which could feed net info to the wearer while they are in the home.  Could as easily be a pin/brooch/ring.  This silly product line makes no sense to me, honestly seems like a hige waste of resources, but at least they have created a zigbee keychain interface, which is very cool.

I began making USB desktop extension devices in early 2004.  My first design was a n LCD text display.  My second design was a USB RGB lamp.  This first proto uses the USB high power mode and a high-brightness RGB module by Lamina.  I designed the PCB as a retrofit to a cheap Ikea lamp.  I wrote a simple VB app to test basic functionality.  It works beautifully.

Check this out.  This is only vaguely related to ambient informatics, but it is inspiring for its out of the box thinking.
There are lots of great water ideas for ambient informatics: someone at Stanford made a fountain, the height of which was driven by the Dow.  Of course, they used bootloads of clunky and complex computing resources to make this happen.  With Atmosphericon you could create the most basic D-A pump driver mechanism, and a simple script on the PC side could drive it.

What about many pumps, or many valves, each tied to a different data source?  What about pulling the color aspect from the above idea, so that each data source was easily distinguishable?  This would be beautiful!  See the water music machines of Trimpin for more valve fun.  (can anyone find me a better link?).

What about weather?  A fountain might be a nice way to indicate weather predictions.  If, as you head out the door in the morning, your fountain is running strong and high, you had better take your umbrella!