Using MotionX GPS lite app from the App Store, how is your accuracy? My accuracy is around 56-156 feet outside with a clear sky, that is bad.. My HTC G1 GPS is accurate to 19 feet indoor.
I rarely get signal indoors. In fact, I dont think I ever have. When I'm biking I get somewhere between 10-70 meters. It may be less accurate because I'm in South Korea. When I was in the US it seemed to catch a signal really well, here I'm lucky if it works.
I used it when I went biking, and here's one of my tracks: http://bit.ly/Ohj5H.
If you follow the line going east, you see that I must have unknowingly biked right into the river at one point... haha
56 feet and 156 feet must be some kind of preset distances for accuracy, because that's all I ever get, whether it's using the MotionX app or the Geocaching app. Once in a very great while I might get down to about 30 feet, which is no good for caching.