To tackle this, I ended up with a small project: given a gist ID, generate the embed code along with
NOSCRIPT tags so the content is indexable. This will only solve the initial problem, as updates will not propagate to the blog, but... you can always manually update.
Heres how the site ended up: SEO Friendly Gists
This is hosted on GitHub if you're interested in adding features. (Or hit the "forkable" link near the title)