We have had Facebook Connect as a part of Mercury for a long time but apart from using Facebook's "social tools" (which require a popup and an extra step to post) we have not spent time working on pushing content directly to a person's wall.

A late night last night led me to the right articles online and the right configuration so that I was able to push a wall update programmatically.  This won't be super useful until I extend it to posting blogs or status updates but it's the most important step!