We're not cruising until 11/05 and I have both editions. If nothing else, it gives me something to read in my "spare time" that gives me a dose of pixie dust to get me through!
I say, go for it, then get updates as you get closer to your travel date. Then, buy the current edition if you like. BTW, I highly, strongly recommend the deluxe versions (I have both
DCL and WDW for the past 2 years) It's easy to take out pages you don't need, add pages of your own, and I love the PassPockets!