What you see today is not a simple change in style, but a complete migration from WordPress to a static site.
The main driver for this decision is the disliked for LiveWriter or in-browser editor and conversely my growing reliance on Markdown. I tried using WordPress plugins for MD, like Mytory Markdown, but the result was never satisfactory, as they do not support Github syntax.
So I moved from a basic AWS machine (see How I set-up this blog), to a static web site on Azure.
I wanted complete control of the path from Markdown to HTML, so I opted for Jekyll and its vibrant community. I used the portable Jekyll for quick local testing, but the real work is done on an Ubuntu VM (on Azure of course) with a simple Git hook to automate building and publishing after pushing the new commits.
There are lot of details but this is a task for future posts.