I just bought SSR a couple of weeks ago and have the 1/2007 POS for SSR The Tree house are is still included and there are no amendments to remove it. That does not mean that they have done this since it was printed but I believe you would have to check out the Orange county Auditor web site to see if they did this.
If they made Treehouse Cash only they would not have to remove it from the SSR because they can do anything they want. Its does not make any sense to go through the expense of legally removing THV from SSR land and attaching it to OKW. I also don't believe the infrastucture is there to make it a stand alone Hotel. My guess is that if will be a mix of
DVC and cash or an area for Disney excutives or special guests.