Here are some old, probably obsolete notes from spring 2010 for this project
Here is a proposal that I wrote for my Fall 2010 independent study at Wash U.
Check out AndroGeoid, a blog that explores geography-related Android topics.
BlueGPS is an app that allows an external bluetooth GPS to be used with an Android phone. A quick Google search for bluetooth GPS turned up some promising units that have similar specs (water resistance, SiRF III, WAAS-enabled) to the Garmin 76CSX units we use. Example: Gosget SB-379