I get it, really, I do. Syntax highlighting plugins can sometimes be a pain in the rear... sometimes they don't work the way you want them to, sometimes they conflict with other things your site is trying to do, and sometimes you have to fight with (some of) them to get the characters you want to display displayed (e.g. encoding greater-than and less-than symbols as > and < instead of just writing > and <)...
Lately I've seen many blogs switching to the use of embedded Gists as a way to show code samples. I think this is a terrible idea.
Sure, Github seems pretty stable and popular now. I love Github and I host many of my projects there, but you won't see me outsourcing my blog code-sample hosting to them.
What happens if they get bought by AOL for two billion dollars and AOL decides they just don't like the Gist service. Poof. Gone. Your blog, which will live on in perpetuity (as long as you keep paying the bills) now has large and important chunks missing. The value of those posts just disappeared.
Even if they decided to give you 6 months notice before shutting the service down? You'd then have to go through your entire blog history and convert the gists into either another service or embed them in the blog directly.
By hosting your code samples elsewhere -- anywhere other than on your own blog -- you're making a bet. And that's not a bet I would make, ever.
These days I've settled on what I think is a much more robust solution: Prettify. It's a JS library from Google that is 100% language agnostic. You don't have to do any "brushes" like Syntax Highlighter. You just wrap every code sample in
<pre class="prettyprint"> and include the JS library on your page. And if you're not a huge fan of the color scheme, there are existing themes and it's easy to tweak it and create your own, too.
So please, bloggers... Knock it off. You're making the internet worse, not better, with these shenanigans.