Skychatter is a Google Maps mashup for pilots and the aviation community. It shows a map of all FAA-registered US airports and includes reviews, technical data and weather information for each airport.
On Skychatter, pilots can easily surf the map for airports. All airports large, small, grass strips, sea-plane ports etc are listed. While scanning the map you can select an individual airport and quickly see its actual airport runway layout with a pop-up satellite view. You can also check the current weather there and you can read reviews of the airport written by other pilots.
If you are a pilot wanting to explore and fly to new airports, anecdotal information is very valuable and is often hard to find. Skychatter makes it easy to find and share such anecdotes via airport reviews.