I am pretty new here but I thought you might like to know about an xml api I discovered for managing various game mechanics in multiplayer online games. The whole thing is powered by pubnub.
I think this could be very handy for people developing multiplayer games with the intention of packaging them for tablets and smart phones.
The main site is:
It took me 3 days to get my invite.
Here is a video of him creating a harvest mechanic as you may find in a game like Farmville.