I was looking around for some organizational apps in the vein of getting things done (GTD) and came across this PPC app that supposedly is based on the desktop app ThinkingRock (
http://www.trgtd.com.au/index.php).
The PPC app can be found at
http://www.vcharite.univ-mrs.fr/PP/y...ppc/index.html
Perhaps if there's enough interest and utility it can find its way in a future update.