A multiscrobble support for sending information about songs for example to last.fm and libre.fm simultaneously.

Right now last.fm plugin supports scrobbling only to last.fm. For now the only way to change support for last.fm to (for example) libre.fm or django.fm is edit the source of the plugin or edit 'hosts' file on the disk. This feature should be included in this plugin because people sometimes want to use a free and open alternative of last.fm.
Plugin should support scrobbling to 2 or more services simultaneously. If it is impossible, it should at least allow to easy change where send the info about songs.
When this feature will be included, the name of the plugin should be changed to something like "Scrobbling plugin"