Google Map + ??
From Headway Wiki
Google Map + ?? is a mashup created by Brent Rieck that uses the GTFS feeds to display user-selected routes on a Google Map. It was first posted on January 29th, 2008 using TriMet data. On February 4, 2008, he added CapMetro coverage from their public feed, and plans to add other systems that have published their data.
