Guide book questions

[DisneyDad in PA]

I leave for my trip on September 29 and have currently been using the 2006 Unofficial guide that I bought for my last trip. Would it make sense to buy a passporter at this point?

We're leaving on the 16th. I have been using the 2005 Unofficial Guide and they have updates on their website touringplans.com. I haven't seen or used the Passporter, I know alot of DISer's use it. However, between the Unofficial Guide and the DIS Boards I can't imagine what new info you can find in it. Other than I hear the MAPS are nice, but you can get those free at the Parks.