This spirit level has nothing to do with your Karma, but more to do with making sure your shelves are straight. The recent release of a managed API for the HTC Touch Diamond accelerometer has the development community in a buzz, and it seems motion-enabled apps will be overflowing very shortly.
Spirit Level was written by XDA-Developer member fxxxxxx in response to a user request, which does demonstrate how accessible this advanced piece of hardware has now become.
Download the app from XDA-Developers here.
Edit: Developer fxxxxxx has notified us that the latest version of this increasingly useful app, which can now be calibrated for the individual variation of the accelerometer in each device, can be downloaded here.