hello alex,
the last days I also tested your other modules from the package - very nice

but I would have some ideas though:
invite: I already wrote about some new functions and the limitation - another thing is that it would be good to know who you have already invited. let's say we have a maximum of 30 invites but 500 facebook friends - then it would be a help to know who has already been invited or already a member of the site.
friends: really good to get displayed who of your friends is already a member to connect to them. but now the displayed friends are linked to their facebook profile - so you bring the people away from your site. would be great if the links go to the profile in the site so you can start interacting.
global: for me I can say that I never like to read a message what it's not there (no friends, not connected or what else) - so it would be great if an modul is only shown autmatically if there's something to tell. should be easy to realize with "if"...
that's my idea for now - keep up your great work, I also already gave you a revew at jed