I like the general feel of your site, you have used colours very well and to good effect but there are a few small areas that I feel need some work.
The mock client stands out more than your identity, as northpark has said your logo isn't memorable, therefore you have no identity at all. You may need to look more deeply into this, or just don't have something bigger and redder than your logo in the content of your main page
Bryan commented on there being too much wasted space, I don't think this space is wasted, simply unnecessary. Whitespace is a great tool, but there is too much in this instance. You could spread the content modules out a little more, let them breathe a bit.