I've talked about direct publishing from Expression Media Encoder to Silverlight Streaming before. We'll be talking a lot more about this soon.
However, today at Gnomedex myself and Angus Logan from the SLS team did an end-to-end test of the latest version of the plugin.
Along the way we also tried SkyDrive as well as a new Live Writer plugin I've written today, whilst at the conference, to insert pre-existing Silverlight Streaming applications into blog posts (I'll be posting this in the Writer plugin Gallery shortly):
You can read about our fun and see the results here on Angus' blog.
I attach the current version of the LiveWriter plugin to this post; unzip and drop it into
%programfiles%\Windows Live Writer\Plugins
Installer to be done.

if the Account Key has a space at the end, Windows Live Writer reports the plugin crashed.
Thx.. i'll fix it as soon as