Ah, this would be fantastic! I've just started playing around with Cayenne with the hope I could use my DHT11 humidity and temperature sensor, but it currently is not supported. It would be amazing if it could, soon, because there are some ideas I already have in mind.
PS - This sensor can be integrated with Beebotte.com - it's more of a dashboard than anything, but I currently have it logging the temp and humidity of our office as the girls always say they are too cold when the air con comes on and it's unbearable for us guys wearing shirts and troursers! Ha!