It appears Google Plus is mainly written using Java on the server side. So I wonder if it will be compatible with the existing OpenSocial APIs Google has created with MySpace. It could easily be done using Apache Shindig, the reference OpenSocial implementation for Java.
Does anyone has information about that?
Yes, it runs on open social.
Watch the requests in your browser and you will see something like this:
https://r3101-dot-latest-dot-project-slingshot-gp.appspot.com/
?loadFrom=ES
&jsh=r;gc/[OBSCURED]#id=gameIframe
&parent=https://upt14k1i2veesusrda9nfotcrbp9d7p5-a-oz-opensocial.googleusercontent.com
&rpctoken= [OBSCURED]
&_methods=_ready,_close,_open,_resizeMe
the domain ...opensocial.googleusercontent.com seems to make it pretty obvious whats going on here, no?