Oh my god, it's the big release day today. Finally the RTW version of the Silverlight Tools were released. To be honest, I can't see the big changes when looking at the feature list, but there must be something, just not that clear I think.
You can see more here at this post: http://silverlight.net/blogs/msnow/archive/2008/10/28/silverlight-tools-rtw-released.aspx