SMF is "Simple Machine Forums" which is an open source forum (the one you are in now and the one on Joomla.org). What folks are talking about is the upcoming SMF skins that Andy and others are working on. There are many skins (themes) out there, but none of them integrate well with Joomla. So, we anticipate that Rocketthem's SMF forum templates with be the best (and the only) at integration into Joomla, much like this forum looks so nice.