This post was written with final version of Windows Live Writer (version 12.0.1366.1026), which was released today, along with other Live products, combined in a single installer:
[This screenshot was taken on my beta/test laptop, which is... slooow - note the text in yellow. Nice]
I'm happy to announce that my MessengerQuote WLW Plugin continues to work with the release version too.
Get your Live here.