Well, just started learning Python, a really nice language. For learning I made this plugin, that list all mounted disks in /media and all gtkbookmarks (havn't seen it for real yet).
If I work a little more with it I somehow might figure out how to update the list everytime you put in a removeable-disk
It isn't complete but it works, I hope :)
Just extract the tar.gz-file and put USPGTKPlaces.py and USPGTKPlaces.glade in ~/.usp/plugins