Wow... this is simply impressive. There is no other way to put it. I thought Newgrounds was spiffy before, but this seriously blows other websites out of the water.
I love the backgrounds and how their colors kind of correspond to Ng's 'colors'; the background on the main page is orange-ish/yellow, the judgment page background is purple, etc. That's really neat. I love the new emoticons, I love how clean, simple, and sleek everything looks, from the forum and userpages to the portals and such (I'm glad you kept the classic movie/game portal - I'll probably still use that for a bit).
The only things I'm apprehensive about are the new icons and auras -- not a huge deal, I just liked the other ones better. I also liked the headers that used to be in the userpages (now replaced with ads). As for the game and movie thumbnails on the front page - I do like them being larger and clearer, but I sort of miss the short descriptions that came along with them! It's nice to see those if I am in a rush and really want to be selective about what I would like to watch.
So far, this has exceeded my expectations. Newgrounds feels even more like 'home' than it did before, which I wasn't anticipating. It feels actually much more catered to its users and contributors than ever before, which is what Newgrounds' foundation is to begin with (along with its amazing staff, of course!). You guys did an absolutely astounding job; I hope other websites don't start doing redesigns that are this awesome!
I'm so proud to be a part of this site! Time to start submitting stuff, huh?