There is a new beta version of the free tool I use to manage and post articles to this blog with Live Writer "Wave Writer". There has been some new features such as inline spell checking, offline post management, link glossary, tighter blogging platform integration as well as new User Interface "UI" enhancements.
Windows Live Writer Beta http://writer.live.com/
There is also Microsoft Instant Messenger 8.5 Beta and Live Mail versions available as beta.
Beta is pre-released products in testing for the purpose of receiving feedback and testing so if you are no comfortable with this then wait for the final released version.