Comment 4 for bug 1177341

Note that I started work on an emulator for this for autopilot ubuntusdk app testing. I think it's best handled there. It's sitting in my +junk at the moment, but I'm hoping it could have a permanent home as part of the sdk. Check it out here. It provides the requested features:

lp:~nskaggs/+junk/ubuntusdk_autopilot_emulator

It's currently being used for the core apps project developers as part of the drive towards autopilot tests for all the apps.