We had a user who upgraded his copy of Device Tracker and could not add new records. We sent him a file to try to import a record. That seemed to have sparked is app back to life and his data was there as well. Send us a note by email if you are having the same problem.
We have just submitted Device Tracker 1.2 to the App Store. It should be available shortly.
Please back up your iPhone/iPad before updating the app. We have made changes to the data store in order to add Export and Import features.
Our first independent app became available today.