Check out the Quick Hits in the top-right corner: They now have comments enabled. Now, clicking on a Quick Hit will take you directly to a page for that QH alone, where you should see a “Post a Comment” link at the bottom. Hard-refresh your browser if you don’t see the changes.
A big thank you to Paul Preston (aka “soapy”) of SoapBlox for installing this, and to Open Left for helping to develop this feature.
So go ahead and give it a whirl!