Information Interoperability and management for multiple "Commons" Sites

 Hi All,

 After reading (Is there something like "Ideas" feature? ) and watching ( Commons 2.0 preview: Status Wall (screencast) ) spontaneously it come to me in mind: Facebook.

 Meaning that the Acquia Commons development team is really starting to think BIG with "Commons 2.0" fortcomeing. This is not wondering me, being a Drupal Evangelist from 2006 and witnessing the main stages of a really fantastic opensource community.

 Having to deal with many small "Commons" sites and trying to build many information exchange blocks and content sharing in multisites Commons environment I would really appreciate to know what kind of solutions you may suggest to enhance "providing information exchange" like feeds, users post, featured post.