I produced an interactive Google Maps mashup on Tuesday, updated Wednesday for The Washington Post showing the area affected by a major disruption in WSSC water service in suburban Washington DC in Montgomery County, Maryland. The mashup also allows readers to plot their own home or business address onto the map to discover if they fall in the affected area. A similar mashup (without the searchability) received over 100,000 hits on the WSSC water utility site! No word on how many saw mine.
Related Washington Post article here by Dan Morse and Katherine Shaver.