Just thought I'd mention that if you book through Orbitz you can get an extra 15% off of Disney's discounted rates. The code is email15. (I also went through ebates which will give me an extra 1.3% back...not much but it all adds up)
Also if you participate in the orbucks thing, there is a promo that gives you a bonus 60 orbucks.
I had to change my dates for my Pop century stay due to husbands business trip, and was waiting for the fall room discounts to come out. So this morning I booked my 3 nights and paid $271 for it (standard room Oct 5-8). The bonus $60 orbucks didn't show up yet, but claims it will in the next 5 days.
Edited to add that I just went into
MDE and linked the Orbitz res to MDE (the Disney conf was in the email they sent to me), and I also already entered everything into Magic express for my res.