TFNation have announced that volunteer applications are now open with a form being made available on their website https://tfnation.com You can find the full announcement below
So, you have to buy a ticket to spend your time volunteering for the con? That's... interesting. I've been to dozens of DW conventions and the staff have never had to buy a ticket. The perk of giving your time for free is being able to attend the con without paying. Looking at the guest line up, there's really no-one of any great interest anyway (I know, this will vary per person, but for me, the only interesting guests are the two voice actors and, maybe, Emiliano Santalucia, and I only know him because of He-Man.org). To ask someone to buy a ticket and then spend their time herding people and/or looking after the guests is bad form.
Maybe, once approved to be a volunteer, they will refund your ticket price. This way it just guarantees you will be actually attending. If not, that's garbage to make people buy a ticket then give up their weekend volunteering instead of enjoying the show.