I'd been looking for a better comments solution and hopefully have found it in Disqus, a Silcon Valley based start-up whose progress I've been following for a while now on some of the blogs I read regularly. There are a few things I like about the system besides "hopefully they're prettier" without requiring me to restyle the CSS for WordPress comments!
There are two major benefits for us: one is that we can respond to comments via e-mail, and both home and away that's a real bonus. Secondly there are a variety of ways to access and share the comments througout the Internet that didn't exist with the current system.
If you already have a Disqus account, you'll be able to use it here. If not, I encourage you to check it out at www.disqus.com, although you will still be able to post comments without registering.
All old posts will still be with the "old" comments, but all new posts will have the Disqus comments. Hopefully it will work out without any major hiccups!