I'm sure we all know about the new NG layout, so here are my suggestions for what would make the site a lot more appealing:
More graphics-based home page
The icons are currently too small and there's nothing which really makes you go "Yeah, I want to check this out" without looking really closely.
One-click viewing and voting
Like on YouTube, you should be able to click a submission's link and go staight to it without any beginning screen with "PLAY THIS GAME", for example.
The movie's page should also include a vote panel which just counts your damn vote without taking you to the "You voted .... on this submission, raising it to...". It's just annoying. You should also be able to leave comments in the YouTube way, i.e. not being taken from page to page to do so.
Bigger "SUBMIT CONTENT" link and more focus on viewing your account details
When I first joined NG, it took me a while to figure out how to upload a movie. Perhaps making a bigger link could increase spam, but meh. There are always people who will create alt accounts or use different IP addresses with this system, so there's really no way of stopping the spam.
And yes, you should be able to see how many messagesy ou have on every page without having to go to a new section. Also perhaps some stats on video views, latest awards.
The NG "Gamertag"...?
A little XBOX-esque NG card would be cool. Like with your name, an icon and your latest movies, batting average etc. That would kick ass.
Polls on the forums
Every good forum has an option for creating a poll. Don't let NG lag behind without one.
Well, that's about it. All other stuff, such as an updated audio portal, bitesize etc, has been publicized already.
Feedback is welcomed.
I know Darkside already responded, but I thought I'd post it here so everyone else can.
Also, I like my idea of the NG card. It could be easily done with a little .png image file and with people posting it in forum sigs and stuff, NG would be advertised well.