Help! Busy Website Needs Redesign

In an effort to visually clean up the web site, balance product-centric content with customer service and educational content, and efficiently funnel leads, this ecommerce site is about to undergo a redesign. Here's a bird's-eye view of the current look. (Static is hidden content placed for privacy.) Want to throw in your suggestions?

Click to view full-scale.

I will post the mock-up of what I've worked out so far later to show the steps I feel need to be taken (within the guidelines I've been given by the site owner), and how it lines up with what you've suggested.