All looks good design-wise! The site seems quite functional, and, as you say is "simple."
There are just a couple of small errors in the text you may want to fix... You're missing a word in the Network Facilities box ("Our servers are located ____ a state of the art data center.") You also have a slight problem with the Plesk Control Panel description try making the use of verbs in that list consistent. Try something like "...technical domain owners to manage their website. This includes the ability to handle e-mail, create protected directories... manage multiple databases and database users and utilize a web-based email service." My last comment is actually a question. When you mention 'utilizing a web-based e-mail service,' is that different from the e-mail handling you mention earlier?
I hope that helps! Good luck!