Go to the main forza forums and look for the thread called forza season status and news and go all the way down to the last post and it will tell you what team your on. Then go to the first post and there you will find links to the assigned team that you are on.
Linuxx you are on the Red Team. If you go to the bottom of the forums in the Private Player Forums you should see a Forza Team Red forum. That is our private team forum.