I am almost done building an Android application. Is there a way for me to 'deliver' the app to my client so they can install and test it on their Droid phone (without putting it on the Droid Market!).
I don't know for sure, but perhaps you can send them the apk file from your app's build/android/bin directory? They'd need to adjust their droid's settings to permit installs from "Unknown sources" (Settings > Applications)