I managed to get on the beta for a load of Windows Live stuff. I use Windows Live Write a lot to blog and the current version is a nice refresh.
It shows as this.
The main differences I can see at first glance is the moving of categories to the bottom of the window.
Also you can paste images direct into the GUI and they get uploaded and linked automatically. Once I have had a good rummage, I will update you with anything else I have discovered