Go-gas.com tells you how much a car trip would cost and lets you share the result. You can plot a route with a few mouse clicks or by typing in some addresses. The route can have multiple stops.
Your Mashup not listed on ProgrammableWeb yet? Tell us about it and get listed.
Make data from the Tixik API available on Locago.
Jon Udell Google Maps Screencast
Google Maps Mania
PHP Wrapper for Google Maps API
Python Geocoding Aggregator
APIs, mashups and code. Because the world's your programmable oyster.
Executive Editor, ProgrammableWeb. Author, Map Scripting 101. Lover, APIs.