Not sure if this should be in exhibition or bar sport, so mods please feel free to move.
I've recently got an HTC Hero android phone, downloaded the Android SDK, done a bit of reading, followed a few tutorials and came up with this.
Its a simple widget taking the simple xml served by my ongoing Arduino project and displaying the time, date and temperature in the house and outside. It updates once an hour to get the latest values. If you are wondering the temperature inside was during the day with the heating off as I dont feel the cold that much and the wife and kids were out.
Its a very simple widget, not very pretty, but it does the job and could be easily expanded or made prettier. Details here: http://scratchpad.thisandthose.org/scratchpad/article.php?story=2010012712152292