I like the idea except it is U.S. only.<p>Okay back away from trolling, I thought these kind of modeling was something to be done on server side, but you app seems to be doing it on the client side. What's more, there are many more interested in these (including weather stations) things but I am guessing there is no way you guys are giving away the algorithm to make the prediction.
As promised in an earlier thread (<a href="http://news.ycombinator.com/item?id=3186978" rel="nofollow">http://news.ycombinator.com/item?id=3186978</a>), I've written a blog post describing how Dark Sky operates under the hood.