As they say, looks legit. Found this floating about on the Desire HD forums, and tried it out on my creaking Leedroid based Desire. Looks just lovely, much better than the other Sense 4 widget floating about.
Note that the widget isn't animated in any way, and works independantly of any oher weather service. Ideal for people running ASOP, or Sense users that don't have HTC Laputa installed.