WordPress version 2.7 is now available, with a brand new backend with many enhancements including editing and replying to comments, QuickPress – a way to post direct from the dashboard, the return of Press This – a bookmarklet that will let you post about any website without having to go to your blog, and much more.
A video about the new version can be seen here, and even more about the new release can be read on the WordPress Dev Blog.