I think you should add more than one article on the homepage of your blog. The theme has a picture of a sunset, change that image to something related to your blog.
Your logo is cutting off the top of "Related Posts" on my 1024x768 monitor. Also your addition of right side ittems is causing the page to have a horizontal (L-R) scrollbar. The Google Ad in your Blogroll looks lame - it's a place users expects links to BLOGS that you ENDORSE. Not a link to an ad you make money from! Sorry I seem to be harsh, I'm having a 'G hate day' today! What is the code "XGNKJBQF3K92" at the top of the first paragraph of the "What is Page Rank?" post? Your blog ID's nickname is set to "admin" - should be a human sounding name.
i'd suggest to put post under cut or even make an index page with several sections, like popular + recent posts, and most important information. then inject the ads somewhere in between.