I don't think rounded corners of that size are in fashion anymore. Its either no rounded corner or a very small one.
A vertical navigation bar is also un-fashionable these days too. I can't remember the last time I've seen a website with one that wasn't web-app like facebook.
The banner needs re-doing. I don't think the blue/white gradient looks very good on black, and the image of the hand with the usb doesn't really fit into the ethos of the website.
I think there is also too much of a gap between the top of the page and the banner, and the coloured nubbins above it serve no purpose.
On the page itself the justification elements are all over the place. You've got a text box left justified at the top, then a heading thats somewhere inbetween left justified and centered then the rest of the things are centered. You should pick a justification and stick with it in any given section, otherwise your eyes are darting all over the place.
You need to make things consistent throughout your web design otherwise things tend to look a little mismatched.
Its also a good idea to look at your competitors websites, and see what they are up to.
Just a few of my thoughts!