You sure cover a lot of topics. Overall you didn't overcomplicate the forum with needless graphics, which was a good idea(although I assume you will be wanting to add some minimal advertising links in the future).
Your Computer & Notebook deals will quickly turn into a used computers section(I noticed a dell for sale there already), and you might want to move it, and any discussions that might lend to sale offerings to a separate catagory.
You might want to start with more simplistic top level computer related catagories such as HW, SW, Internet, and organize down from there. You can always move something ou to its own catagory if it takes off(E.G. Wireless networking under HW to begin with, and move it out later if it grows).
