A good Swedish holiday calendar can be found at http://www.nygge.nu/ical/svenska-helger-2006.ics
The temperature information on this server is collected with a
nifty gadget from QualityKits in Canada.
To get values, a perl script reads the serial port every ten minutes and writes results on console and to a file for charting.
This should work on both *nix and WinDoze. Values is also stored in a MySQL database for viewing with DTGraph.
What seems to be ordinary gif file charts on the front page is actually perl scripts that use GD.
A sample of the temp chart can be found here
NUT is monitoring the Yordin UPS and has finally included the ups2 code into the main distro
resulting in a more healthy system load. Front page chart is reading directly from the NUT client as seen in this script.