This could help out a bit.
Apple has added driving directions to Find My iPhone with version 2.0.1 of the iOS app for iPhone and iPad. Users now have the ability to get driving directions courtesy of Apple Maps directly within the app.
The directions include voice turn by turn directions and in-app directions, too, just like in Apple Maps.
The update also made the Play Sound, Lost Mode, and Erase buttons all appear separately from the map view within the app.
The Find My iPhone application is free, available on the App Store and requires iOS 5.0 or later to install and run.
If you’ve tried the new version and have any feedback, please let us know in the comments.