Google launched a new feature to let you ‘upload and map large amounts of geographic data’. You can also now hide and show different data depending on your own criteria. “Google Fusion Tables is a place in the cloud for your data tables. In addition to filtering, aggregating, mapping points, lines, or polygons, and exporting to Google Earth, with Google Fusion Tables you can integrate different data sources, collaborate with others on columns, rows, and cells, and visualize your data in lots of other ways. If you want to connect your database to the Fusion Table map programatically like MTBGuru.com did, check out our API.” MTBGuru describes their experiences using Google Fusion Tables to show all 5000 trails on one map, embedded directly on the site. To try this for yourself, go to Tom and Dirk's live map.