Check out this tinyurl link below for an amazing HTC HD2 Sense Theme with Real Animated Weather for the iPhone 3G & 3Gs. This free theme was made by ALIEN1974 over at modmyi, and it works great on both my jailbroken 3G and 3Gs models. Please note that my iPhone 3G lags at times when running the full 3Gs version of this animated theme. In turn, I recommend using ALIEN1974's 3G specific theme instead of the more animated 3Gs version, on the iPhone 3G.
HTC HD2 Sense Theme with Real Animated Weather by ALIEN1974:
http://tinyurl.com/24dvfqb
Enjoy!
Best to all,
R