Aggregate comments from everywhere

"Comments" are happening in many more different places than just the comment input form on the original post.

Increasingly, it's hard to follow conversations across not just different blogs (where trackbacks / pingbacks still work), but also in Google Reader "shared notes" and on Friendfeed.

There is already a Friendfeed comments plugin, but really, if I'm going to install Intense Debate, I'd love to see the service take care of grabbing all the comments for each permalinked post from such remote services.