Plug In's

You need to download the Last FM plug-in for Skype. But that's not all. 

Next you need the Last FM plug-in for WMP. Or whatever player you're using. Finally, enable the plug-in's in Skype and WMP, respectively.

So, now, as long as the plug-in's are running (constantly, forever ... watching you) on your computer you're good to go. Hurrah!

Go where?

I'm glad you asked. 

By following the above manifest tasks you can allow - and wait for it! - you can allow your contacts to see what music you are currently listening to via the medium of your mood bubble[1]. You can hear it but they can see it![2]

Why you would want to do this is a difficult question and certainly one for greater minds than my own. Perhaps a university study could be done on the subject.

Oh yes, one small drawback to mention. It doesn't work.

[1] wonder how long until your mood bubble can actually gauge your mood.

[2] one of my contacts was listening to Bill Evans so I immediately knew he was in a mood to be seen listening to jazz.