Into the foreseeable future Battleground has no plans to allow FW rules / units in our Singles events like the one coming up on October 13th.
Into the foreseeable future Battleground has no plans to allow all of the FW rules / units in our Doubles or Trios events.
There have been several good points presented in this thread for why we do not, should not, and almost certainly will not open up our all of our events to all of the FW rules / models.
I won't get into the details (some of which have been mentioned), but currently I believe it is not in the best interest of Battleground to fully support FW in any of our events, outside of the Megabattle.
It is important to note that 6th edition is in its infancy. Players that are interested in fielding FW units in our tournaments should look to Doubles events next year and other, different, experimental events in 2013 as well.
In the interest of appealing to the community and hobbyists, I think it's probably a pretty good time to mention Thursday 40k in Plainville. Players can absolutely bring and field their FW lists and models on Thursdays (or pretty much any other time). I think that there are plenty of players that would enjoy seeing the FW stuff in action there.