UsabilityTest.com redesign - clean web20 look needed

UsabilityTest.com

We are an established UK company which launched many successful websites seen by million+ visitors a month.

This is one of our projects and opportunity for a designer to work with us on other future projects exclusively, which we already have in the pipeline.

We will also allow winning bidder to showcase his website using "Designed by" in the footer.

Web developers, web masters, user experience designers

We are re-launching the usabilitytest.com with a different proposition for the users, therefore new design is needed to communicate new features.

1/ Attached is a simple mockup of the homepage which lists copy and rough layout we would like to use. Please not that layout is not set - you can come up with your own stuff, but this layout is currently what I think could work and how I have seen this layout working on other sites I like.

2/ You can use existing logo or create new one if you feel you can come up with better one - current logo is good but not amazing - I like its simplicity and conveying the idea of abstract usability concept quite well.

3/ The color schemes should match a logo.

4/ Homepage will include a screenshot of the application "dashboard" (sample screenshot included - which will be reskinned to fit site color scheme and layout). This screenshot will be clickable and should have transparent "play" icon so users can click on it. After the click, lightbox appears with video playback of How it works video

5/ Design should be centered and made for 1000px width

6/ Sites I like the design>
http://www.pingdom.com/
http://www.huddle.net/
http://www.mailchimp.com