The problem is: the Plus! plugin is triggered when you type a command or use a special tag. Those are the times I can return /nick commands for example... however, the other way around: updating the name when the media player changes it's song, is another story... then there's also the support for multiple media players, two of which don't require a plugin to get song information (so I don't plan on making plugins either)... all in all it wouldn't quite fit into the purpose of this plugin...
Oh, and the before-mentioned argument still counts of course. If there's anything I hate it's changing nicknames, people doing that get an instant Block & RemoveTM in my list... so it would be a bit ironic if I was to implement that function in my own plugin