I was lucky enough to receive the email to set up the 'Stay, Play, and Dine this fall' trip last year. I received the email in the first week of May, and travel had to be booked by June 2nd, so you only had a month to decide/plan your trip. It was good for travel between Aug 21-Oct 4. The email message contained a PIN number necessary to give to the rep, so you could not 'share' this deal.
This was an amazing deal, but it seems that Disney changes their gimmick every fall. In 2004 it was the 5+2 deal, 2005 was the DDP basically for free. I'm sure this year you'll see a much different deal. Also, it might not be available through the end of October (last year's deal only was good till Oct 4).
If you can wait to book, I would wait until late spring to see what the special for next year is. If you cannot wait to book, call a travel agent and check with them because sometimes you can book with them and then, if a better deal comes out, they can get you that deal. Kingdom Konsultants is a sponsor of this site, and a highly regarded WDW travel specialist.