Haloscan, which has been the commenting service here at the Hive for a few years, is officially going kaput. In its place, the company js-kit is offering a service they like so much they've renamed themselves after it: Echo.
No, your comments won't be sent to the attic. It looks like there will be a lot of cross-platform compatibility, so people with existing OpenID or other accounts can just log in, and use whatever avatars, profile pics, and online info they already have. Whether or not the actual commenting will be worth anything remains to be seen, though js-kit did a good job with Haloscan and I had no complains. One difference straightaway is that the Echo comments can be threaded. I'm personally not a fan, because it can be harder to find new comments that way; but I get so little comment traffic in general, it's not likely to make a difference one way or another.
This post is the first to feature the Echo system. Try it out and let's see what we've got.