Windows Live Messenger is moving step by step towards RTW(Release To Web) with its new Beta Refresh avialable for download at Live. This version (9.0) Beta Refresh is having a redesigned sign-in screen making it different from the existing beta packaged under the Windows Live Essentials avialable on web. Also its style and GUI is also enhanced which are only cosmetic modification. But still there are no indication by Redmond giant regarding release date of the next iteration of it.
The version available is up to Build 14.0.8050.1202 and this Beta shows the sign of RTW arrival soon. The new sign-in screen can be seen below.