Try making a folder where you would like to have floppy access (for example, /home/ubuntu/floppy) then, in a terminal typing:
sudo mount /dev/fd0 /home/ubuntu/floppy
and then typing:
sudo nautilus /home/ubuntu/floppy
Be careful you don't delete anything important though as you are now fully priveleged with this. For some reason, you have to be root to write to it. Then when you are done, exit the window and type:
sudo umount /dev/fd0
Floppy access seems to be kinda broken by default. For instance, in my case I can read the floppy, but not eject it. I use floppies quite a bit. This should be a viable workaround though.