(I must write slow)
Hey Fred, for me the site is very cluttered, and each section, seems to be fighting against its neighbour and such the information conveyed doesn't feel natural or balanced, in fact the general feeling the site gives me is one of anxiety and suggests you as a company are still trying to understand what you do.
Focussing on specifics...
The main navigation looks really odd as a tab, perhaps would have been better if the background colour stretched across the full width of the End Users display rather then going for the shaped tab style.
If you can spare a bit of cash I really really recommend getting in a good copy writer in, as you have a few occurrence's of slang English on the site, again if you cant spell, will your code be any better? with so much competition in this industry you have to convey professional, dependable and accurate from the word go.
Again this is perhaps a personal note, the site is simply to dark for my tastes, feel you would be far better positioned with a lighter theme.
General structure, for me is a major weakness in this design, things just don't seem to connect, service outline needs work, and the usage of a outdoor image with laptop displayin a website you have done has done a death on the web.
Personally, I feel this should go through a couple more revisions and a few more critiques before opening up to the public for business.
Keep working at it Fred.
Geoff.