i too am curious as to where to locate the android device id #. i guess it's a 16 digit sequence that syncs with the market/playstore. i believe that this person is trying to use the apk downloader extension with google chrome, as it requires that info. currently i am awaiting a new battery to finish flashing my droid x, as it became too low to program. is there an android id # that is 16 digits (letters and numbers) on the external of the droid x?