Facebook Connect is a good feature, but has one big disadvantage: does not describe the interaction in a comprehensive way. I often connect and come up with the screen 'let publish on your wall' and, well, what does it really mean? That you'll post my every single action on fb? Some specific actions? A summary once per day? Will my wall get spammed? Should I trust you?

I don't like when things get complicated too much and that simple approach seems ok, but on the other hand, it lacks detail that would make users feel safe about using fbc. If 'publish on your wall' had specified settings for the webservices, it'd be much more effective.