I'm going to be checking out a new(ish) system called Disqus that allows for threaded conversation in the comments section.
Which seems like a good thing.
Check Disqus out here, and aggregated Toad Stool comments here.
I'll check back in a week or two to see how you all like it. I'll post the first few comments here, just to check it out. I'm trying to figure out a way to get the most comments listed in the sidebar, as always. Sure someone's got a widget for it somewhere.