I've done a bunch of searching and I'm not seeing any themes specifically for programming type blogs.
If you don't know Wordpress - now would be a great time to get your hands dirty and roll your own.
http://themeforest.net/category/wordpress
has an incredible amount of themes to get your started
https://wordpress.org/plugins/github-embed/
looks like a decent plugin for embedding links to Github
wordpress.org/plugins/syntaxhighlighter/screensho…
looks good for embedding source code