After a little poking at the docs, DBus-Explorer, previous code bits and having some times ahead, I put up together a small Remote Controller for Banshee accessible within a web browser and using D-Bus for the interprocess wire.
With BansheeRemote you can start your favorite music on your main PC (with all the sounds equipments goodies) and control the thing remotely from your bed, or wherever else, using another computer with a web browser (have I mentioned it’s particularly sweet with an Eee pc ? 
).
You can download BansheeRemote and all the necessary stuff from here.
To use it, just fire up mono BansheeRemote.exe and point your browser to http://your-ip:8081/. You can tweak the HTML presentation to your need or supply another file using the BANSHEE_REMOTE_FILE environment variable.
A small screenshot :
Have fun !
- Press My Buttons !
This is exactly what I wanted to start playing with, a dbus web front end for Banshee. And it’s for the exact same reason you did it, so I can control my main music from my EEE on my bed. Awesome work dude!