Ok I’ve bitten the bullet. Yoast.com is now running on WordPress 2.7, and threaded comments has been enabled. I’ve also updated my plugins that weren’t working on 2.7, so all should work well now. If it doesn’t, please let me know in the comments!
Yoast.com runs on the Genesis Framework
The Genesis Framework empowers you to quickly and easily build incredible websites with WordPress. Whether you're a novice or advanced developer, Genesis provides you with the secure and search-engine-optimized foundation that takes WordPress to places you never thought it could go.