Here they are: Boston, Seattle, and Washington DC.

Some current favorites:

• Boston — failed restaurant inspections, including — gasp — a Starbucks on the river
• Seattle — the city publishes probably the most extensive 911 calls for fire department service in any municipality in the country, including the ability to track the calls that a single vehicle responds to
• Washington, DC — insanely detailed information; everywhere. Start with a few dozen city service types, including tree emergencies and Supercan deliveries (that’s quite a can)