I want to go for the $25 plege because I feel it's the most suitable and affordable to me (I'm not a beta fan when it comes to games). However, in regards to 'Special Thanks', I want to enter my pseudonym for first/last name in the billing info if that's allowed. It may not even be legal as far as I know, hence my concern. I suffer from what I call "Mr. Deeds syndrome", in ref. to the Adam Sandler film -- preferring my nickname over my real one because frankly I don't like it.
As for how I can volunteer, I am a 3D modeler and you can see my work for yourself in the "bot design" and "mercury missile" topics in the respective threads. It'd be killer to have my work featured in something as big as this game and it'd really help in terms of possible employment -- a bonus aside from my portfolio, no doubt. I'd like to be able to say "Descent: Underground is what really jump started my career and I can't thank the guys at Descendent Studios enough for helping it with its major first step"