Really wish that I could help with all the great minds that are coming up with greater ways to make Newgrounds a more enjoyable (although it already is) experience, but for now, all I can think of is (ideas, anyway):
-Blam/Save a day scoring (shows who has the most blams/saves in a day, week, month, etc).
-Tank Replacer (replaces the man driving the tank with your own custom image)
Can't really post any examples of what they might look like, well, to be honest, I don't have the time right this second. I've got too much on my plate as it is. I will be checking up from time to time on what you guys on "The Team" have in store for the rest of us (I'm trying to figure out how the hell the code any of this, but I took a look and it looks pretty complicated, so it'll take a while to figure out).