GeoIQ data center

The GeoIQ data center provides developers with loads of links to free datasets intended for use with their API to generate heat maps and other mashups. Data available include:
Demographics
Offshore Crude Pipelines
Gas Storage Facilities
Offshore Well Production
Simulated Hurricane Path
Electric Demand
Power Plants
Railways
Crude Pipelines Affected by Hurricane
Waterways
Highways
Earthquakes
Past Hurricane Tracks
Offshore Crude Oil pipelines
See http://www.geoiq.com/datacenter.html

GeoIQ data center