Pieter,
When you want to 'pass info to FB', do you just mean to post to a user's Facebook Activity Log that they've read the blog post? If so, that should be pretty easily do-able with Joomblog using our Open Graph - Custom plugin. For Easyblog, we have a specific Open Graph - Easyblog plugin that should make things even easier.
To start, I'd suggest checking out our
Open Graph Actions for Joomla
configuration guide. That explains how to setup the 'read' action for Joomla articles, but it's almost identical for Easyblog and only some changes are necessary for Joomblog.
Let us know if that's what you're looking for, or if not, what you're needs are.
Thanks,
Alex