What I'm trying to achieve:
One Facebook app that I can use across ALL my user's sites. I am already authenticating each user against this app, and have the AccessToken from that authentication. I can modify this to get whatever else I need so long as facebook actually provides it.
I want to be able to change a setting on this plugin (somewhere) on each site so it posts to each user's (site owner's) individual page - through my app.
I do NOT want my users to each have to create a facebook app to do this.
Is this possible with Sharepress multisite?
Also, since v3 is right around the corner (according your comments) - will buying a 2.x license now entitle me to a free upgrade to 3?
Alternatively, can I just buy and get refunded if it doesn't work the way I need it to?