New version of Comment Client will be released at neear time. New version wil be supported new comment API which released in WordPress.

Ryan Boren wrote:

http://trac.wordpress.org/ticket/7446

Latest patch:

http://trac.wordpress.org/attachment/ticket/7446/7446.9.diff

The following methods are implemented:

wp.getComment(blog_id, username, password, comment_id)

wp.getComments(blog_id, username, password, {status, post_id, number, offset}

wp.deleteComment(blog_id, username, password, comment_id)

wp.editComment(blog_id, username, password, comment_id, {status,
date_created_gmt, content, author, author_url, author_email, })

wp.newComment(blog_id, username, password, post, {content, author,
author_email, author_url})
// author info is optional if authorization is successful.
Unregistered commenting is allowed if a plugin sets the
xmlrpc_allow_anonymous_comments filter to true. Default is to not
allow unregistered comments. User must auth.

wp.getCommentStatusList(blog_id, username, password)