Something I didn’t realise was possible until now, is WordPress natively supports Github Gists. All you have to do to embed a gist in your post is copy and paste the gist url on a new line. Everything else is handled automatically!
Code formatting is something that has been difficult for me up until now, any posts from now on will definitely be using gists.
More info here: http://en.support.wordpress.com/gist/
Example:
This is my first time I have visited here. I found a lot of interesting stuff in your blog.
Thanks!
The interesting thing would be whether search engines would properly index source code embedded in gists alongside your posts. Do you know whether they do?