This is one of the best social media websites dedicated to tracking the social media posts about Hurricane Irene. The ESRI map can be described below:
This interactive map allows you to view continuously updated hurricane information. You can track specific hurricanes and see their projected path. You can also access newsfeeds, precipitation, and storm surge information.
The hurricane feeds are supported by the precipitation updated every 15 minutes as well as the storm surge, often the greatest threat to life and property from a hurricane, updated every 20 minutes.
Some other noteworthy resources that I was able to quickly find today are: