I think you have a good start but some points need to improve like social icons.
You can use a fancy font for your headings, also try to add a clients section to your homepage.
You should add a footer section to you design.
Increase the paragraphs line height.
Black color is not good for your design on the footer.
You need to add more features like twitter and flickr widget.
Give a shadow to images on the middle section side like slider.