I'm not sure if the class of 2007 is "filled" yet, but I talked to a current student who said they had movement off the wait-list until the week before classes started last year.
I interviewed in January and my "intial" deposit was due not that long ago. (I say that just so you know that they might be waiting to see what the "latest" class count is.) There were people I met who had multiple acceptances and were "holding" spots ($) at more then one school until they decided where they wanted to attend or until the heard back from their first choice.
If UNE is your first choice and you are waitlisted then I'd suggest sending them additional lors or a letter of intent. 🙂 (I should have warned you that I'd give unwanted and pretty common advice....) Good luck, and if it's your first choice I hope to see you this summer/fall.