I just saw on mousesavers (I think) that hey are due out in March. Do not assume you will get the new ones when you buy them, make sure first. Companies will want to use up all the old ones before they start sending out new ones.
Looking at your trip counter and our trips overlap. I am not worried about getting the vouchers, I figure I will look into who is sending out new ones (here of course, where all the WDW info is) in April and order once I am sure to get new ones... bummer on the price increase... but still a good deal.