If you install the scrobble free plugin for Rhythmbox you will be able to
multiscrobble content to different servers.
The plugin is a early version and not ready to use by everyone, as described
in the mail of the author.
There is a special
page for this plugin
in this wiki.
Single server scrobbling
Rhythmbox 0.12.1 and superior can be configured.
However, the graphical user interface does not permit it (yet ?). you need to
edit the GConf key /apps/rhythmbox/audioscrobbler/scrobbler_url to
You can either use the graphical GConf-editor, or use the following command: