We have a working App in the Android Marketplace.
One of the challenges we have is we post location from our App to a database, we are using [url removed, login to view] guidance. But our results are not very accurate. Only Bid if you have lots of experience in working with Android GPS based applications.
This is an urgent project so you must know how to implement a solution that consistently gets results with horizontal accuracy of less than 50m using GPS and Cell.