* http://www.wunderground.com/weather/api/d/docs -- free at developer usage levels, free allowance for sending traffic to their site, can get kind of pricey if you use it a lot and weather isn't central to what you do.
Incidentally, either of these will deliver a lot more weather data than you were getting with iGoogle.
A couple of other (supported) weather API alternatives.
* http://www.worldweatheronline.com/free-weather-feed.aspx -- free with attribution, paid option to remove attribution. (We ended up going with this for our site.)
* http://www.wunderground.com/weather/api/d/docs -- free at developer usage levels, free allowance for sending traffic to their site, can get kind of pricey if you use it a lot and weather isn't central to what you do.
Incidentally, either of these will deliver a lot more weather data than you were getting with iGoogle.