The United States of Ajax allows you to visit 20,261 Cities within 3,140 Counties in the United States. Data is available for each State, County and City. Dozens of data sources linked.
Your Mashup not listed on ProgrammableWeb yet? Tell us about it and get listed.
Tree by Tree Events
Data Mashups in R eBook
Ruby Geocoding Library
Building Mashup Portlets
Introducing Yahoo! Maps JS-Flash API
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.