Overuse of simple photoshop effects (drop shadow, inner shadow, blurr)
Logo should be sharper and stand out more. At the moment the logo looks like part of the background image.
The camera is good but the squiggly lines on the left look like a random design to take up space.
Tabs colours just aren't working for you. Especially the red one it's hard to read. Have a look at
http://www.softpedia.com/ -they managed to pull it off.
Make the right-hand column wider and the video preview larger and make the left-hand column narrower. This will make it easier to ready line by line and easier to see what the video is about.
Utilise favicon.ico
Remove the section for links unless that is a part of the point of your website.
Left-align the headings and bold them - easier to read.
Your content font is verdana but your heading font is georgia - georgia is more suited to news print in my opinion it doesn't look 'technological' for a website unless your industry can get away with it. Besides you should make all the font accross your website the same.
It's very dark. I would suggest trying a lighter theme.
Just my 2cents
Good luck
