Note (4/15/2008) - With the demise of non-subscription access to TopoZone (now merged with Trails.com, a subscription service), we're scrambling to process all topographic maps for the US and make them available as quickly as possible. We now have four Linux PC's crunching map data 24/7 to produce and index map data continuously. We should be adding approximately fifteen 1 degree x 1 degree blocks of map data (approximately 1000 individual 7.5 minute 1:24000 topo maps) per day. We're starting with southern Oregon (because that's where we live!) and northern California and branching out from there.