Hey, look. Editable and collapsible comments!
There's a post about how it's supposed to work at Blog Huddle, but really, everything you need to know you can learn just by playing around down in the comments section.
If you've been lurking for awhile, now is the PERFECT time to go ahead and sign up for an account to see this thing in action. Auto-updating (no refreshing the browser), threaded (to keep replies next to each other in nice little sub-conversation packages), and now both editable and collapsible. Awesome. It's bound to get completely irrelevant to anything and utterly squirrely down there today, so why not jump in now?
Next up, edible comments, which will be the death of me.