The header and the color schemes look good!
The suggestions that I have have are to:
1. Customize the sidebar to list your posts
Using the wp_get_archives() template tag, you can customize this list in a variety of ways. Let's say you want to list the last 15 posts you've written by their title. Replace the type=monthly as follows:
2. Add a adsense link unit to your footerCode:<?php wp_get_archives('type=postbypost&limit=15'); ?>