Now now, any threads regarding merchandise are immediately good threads!
I've just got back from Florida myself and dread to think how much money I spent on merch at Walt Disney World. I purchased a DVD, Imagineering the Magic of the Magic Kingdom, which I watched just the other day - it provides a fantastic insight into exactly how the park was concieved, it is basically the stroy of the park told by legendary imagineers! I highly recommend it.
I am a keen collector of nice books and DVDs about theme parks so it always a delight when a theme park sells such material. You are spoilt for choice by the books on offer at WDW.