JomSocial - FB Wall missing from 1.5 version

Paolo,
It's a confusing system we have, and one we plan to clean up. I believe that plugin is in the profile_plugins zip file and it's named something like jfbcjsactivity_j1.5_vx.yz.zip

I don't have the exact name on-hand, but hopefully that helps you find it. We're working on a new packaging system to fix these types of confusion.

Sorry, and good luck!
Alex