OK, found it. FYI, it's at the bottom right of any of MB's pages.

Seems cool, but how do you access the options dialogue ?

Cool. :) Any way to disable / enable it on the fly ?

My previous comment is incorrect: it actually works for me, but not in groups.

It's not just you. I can't have it working either... :(

Cool. Thanks !

Cool idea. I often grumbled about the extra clicks needed to know if I was subscribed or not. :)

Yes, the MB links on last.fm artists pages come and go, I don't know why... this is a permanent way to have them. I wanted to write this for a long time, but I always procrastinated.

Thanks Lukáš ! :)

Cool script. I always missed this. :)

Agreed. What I'd like is that some CSS wizard tells me why the logo is not inline in spite of the "display: inline;" statement line 125.