This is the OBD app called Track Addict HD that shows me % ethanol, but is actually a video app that renders vital statistics onscreen:
[video=youtube_share;phAVKY3f6IY]http://youtu.be/phAVKY3f6IY[/video]
More on the app in post #22 here: http://forums.justcommodores.com.au/showthread.php?t=219046
But if you are just after better range of PIDs to log onscreen I'm sure there are cheaper ways on the webs.