We've had simlar thoughts on auotload feature - we are making ours 'loud and proud'. They are free, not cheap and and we want our users to get the full presentation as soon as the device is connected - it is up to them later if they want to delete the files (we'll pin that down in the help file). I don't think making it really subtle is a good idea - they might never get the presentation (or till it was too late)..