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Or you can wait until Android 2.0(for HTC Hero) come out which will have free GoogleNav
Free app Mapdroyd (along with its storage backend app Contentdroyd) is nice for that, although usability of the map might vary with country. It doesn't do route planning or traffic navigation, hence I did not want to mention it in this thread, but it is good for checking your location as you mention above.The very reason i bought copilot was because i decided to check google maps on my phone to help find out where i was. The GPS in the phone pinpointed my location precisely and displayed my exact location - in the middle of a blank screen. Highly accurate and completely useless at the same time. Had to resort to a paper road atlas at that point