Rated 4 out of 5 stars

Very good addon.
There is a weird bug that leaves music icon (note icon that shows before song) in Windows Live Messenger's main window of your buddies. That icon along with the media title removes properly from WLM, but for some reason in main window of your buddies your account shows with an empty music icon (icon without title), while in chat window it also removes properly.

But it seems that if in nowplayingx.js replace:
this.sendToImClient("now-playing-x-live-messenger.exe", "\\0Music\\1\\0\\0\\0\\0\\0\\0\\0");

with this:
this.sendToImClient("now-playing-x-live-messenger.exe", "\\0Music\\0\\0\\0\\0\\0\\0\\0\\0");

this problem is solved..