MOst of the Pinhole assist related info happens here :
http://www.facebook.com/pages/Pinhole-Assist/271190279569897
Current version is 1.7, with version 1.7.1 arroving at the end of the week.
THe latest version includes a calculator for using a "normal" camera as a lightmeter (simply rpeort aperture, speed and iso to get the light measure), as well as a bubble level and a timer.