Yeah it's in the changelog but probably not anywhere people look.

Current version works as follows:

1. If accelemymote isn't running, start it
2. Then, if the phone is turned over in the first 10 seconds, shut accelemymote down.
3. If it is not shut down during the first 10 s, it remains running and can be disabled/reenabled by flipping the phone over so you can use it for specific games*.
4. When you quit MAME, if it started up accelemymote, it shuts it down.

Feel free to add a separate ROM list section on the wiki that has more details about the ROM than the current good/bad/ugly lists. It will be a good place to share information about tested ROMs such as the speed, custom settings, and problems. These are going to be rather subjective based on what else is running etc., but it would be useful to see what the situation is with default/OC setup, for example. Make sure to include the version of MAME and user name next to additions.

* It has to be running, but not necessarily active, when MAME starts so that MAME detects it as a joystick.