Earlier today I wondered what keeps Charmed on the air. It turns out the show does reasonably well in the ratings, though I couldn't find a breakdown of what demographics actually watch the show.
http://www.thecharmedones.com/WritersCharmed.htm
Although it looks like it may be in trouble. WB seems to be getting in the habit of cancelling popular shows for the hell of it. If I'm ever elected to office, my first act will be the summary execution of the entire WB management team. Followed by anyone that approved preemption of the Simpsons for a sporting event.
http://tv.zap2it.com/tveditorial/tve_ma ... 7C,00.html