Whilst comments are, indeed, the life and soul of a blog - and the first line of encouragement for the blogger to continue - using a service to host or manage comments which requires registration is, for me, a no-go.

I want my readers to be able to comment freely and without feeling that they are being brought into a community they may not wish to join permanently, just the same as I wish to comment across the web. Anything which requires registration is, for me at least, a sign to move on.

That said, the ability to link to a previous comment with the person's name - as here - and to edit a comment after Send has been hit is decidedly a move in the right direction. But please, as part of the core and not as a plug-in!