There are two ways to handle initializing your fb:serverFBML tags
(identified by the js library http://connect.facebook.net/en_US/all.js)
which is what our friends at StackOverflow have done. I reference this thread because it kept coming up while I was solving this problem, and the solution they give is outdated.
(identified by the js library http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php and xd_receiver.html)