I second the shoutbox bit.
Also, I'd suggest a tiled background that flows together and doesn't look like three images side by side like yours does.
You need a completely new header. No offense but it looks like someone to a image that already said Dedicated Hackers on it and took the magic wand tool to it to remove the background (the edges look horrible), needs to look smooth. Plus there is absolutely nothing going on in your header, it's just text on a black background. Needs some more excitement to it and a logo.