Scott Stanfield talked about this on .NET Rocks (http://www.dotnetrocks.com/default.aspx?showNum=348) and said that GPS readings aren't precise enough to worry about such fine-grained location. All of the pictures at home would show up as a cloud 100m in diameter centered on your house, not at their actual precise location.

That whole podcast is a good discussion about the intersection of software, tech, and photography.