You don't mention whether you intend to host the tutorial yourself. If not, you might consider setting up a blog on wordpress.com where you can use the [source

You don't mention whether you intend to host the tutorial yourself. If not, you might consider setting up a blog on wordpress.com where you can use the [sourcecode] tag when composing a post that provides all sorts of options for displaying text from various programming languages. HTML used to be supported, but I don't see it in the current list. You might just use 'text' as the language type and then use one of the other options to highlight lines and such. You can see a complete description here: http://en.support.wordpress.com/code/posting-source-code/ http://en.support.wordpress.com/code/posting-source-code/