Interesting blog.
This guy has been looking at the NOAA/NCDC weather data collection stations in California and Nevada. What he found was that many of them are placed in exhausts of air conditioning systems, poorly maintained etc. skewing the temp records that NOAA/NCDC use to "prove" global warming.
NOAA's reaction? Pull the location information off the net for "privacy and security" reasons. Access to the listing of sites has since been restored after he pointed out that their argument was bunk.
http://www.norcalblogs.com/watts/
Interesting site, complete with photos. Not Goracle approved.