Displaying code snippets in Sharepoint wiki

I found hilite.me which produces html styled code which you can insert into a sharpoint wiki.

It supports a number of languages and styles and is an online app.

Not that I'm aware of if you're specifically using the Wiki feature. Your wiki entries are stored like rows in a table as far as I know. If you're not using the wiki you can use the syntax highlighter tool. It's all javascript. http://code.google.com/p/syntaxhighlighter/