Biorust v4 Design

Here's a quick design I've knocked up in Photoshop with the intention of being my tutorials website interface. Well... I say quick, but it still took me ~20 hours to get this far! :/

Please note that all content is fake - its just there to show you how I intend to lay things out (well, at this stage anyway). Its a little light on complexity, but thats on purpose. Biorust v3 was made up of over 76 graphical slices (thats WITHOUT the content), and I wanted to rectify this in the v4 design.

This is the design for users with a resolution of 800x600. I will program the server to respond to higher resolutions and become 150px wider automatically (with consequent changes to the number of featured tutorials shown, random affiliates, etc).

Sooo... what do you think? All suggestions, comments, and general support will be greatly appreciated!!!