I have made a few cosmetic changes to the site. In particular, I have added a "sidebar" to the blog pages. Whatever you're looking at in the blog, you'll have quick access to each category, the last 5 posts, and the RSS feed.
I have also added a list of category links to most pages in the site. A screen capture below shows where they are (in case you miss it). This is hidden by default, but can be expanded (or hidden) by clicking on the + sign.
I also fixed a bug in the search feature that was preventing the thumbnails from displaying.