Scoble brought the whole Shyftr thing to my attention with this post; apparently, it's a service that rehosts syndication traffic and allows commenting directly on their site. There's a lot of chat about that; some people think it's awful, others (like Scoble) seem to be taking a "what can you do?" attitude. That's mostly where I am, but with one caveat: my ability to follow.
For this blog, I don't really have much of a problem, but if you're more popular (like Scoble), the conversation is going to extend far further than you'll possibly be able to deal with. That's what I'd worry about more than anything else; the sheer inability to follow the conversation as it continues to fracture.