NASA just released an amazing video showing Hurricane Irene from August 21th through the 29th -- essentially the entire lifespan of the storm:
Unfortunately the resolution isn't great, but this really gives a sense of the incredible size and momentum of this incredible storm. The animation was created using images from the NASA/NOAA satellite GOES-13, an Earth-observer in geostationary orbit 36,000 km (22,000 miles) above the Atlantic Ocean. It takes images of clouds, which were combined with MODIS images of the land to get this realistic-looking view.
Credit: NASA/NOAA GOES Project