The updated helper can be downloaded here: http://forum.deluge-torrent.org/download/file.php?id=2987
To install it: go to Docky Settings->Helper->Install and select the downloaded docky_deluge12helper.tar
It might require reopening of Docky Settings window for helper to show up in list. It should be called Deluge v1.2
The helper works with the recent Docky (2.1.0) and Deluge versions 1.2 and higher.
P.S. If bandwidths are still not shown, you might be running Deluge in Classic mode instead of daemon. Close Deluge, install deluge daemon with
sudo apt-get install deluged
deluged- deluge client will recognize it and switch to daemon/client mode. And the helper will be working.
Special thanks to this thread and the author of the original 1.2 helper.
Update: if Docky crashes on install of the helper - this is a known (#587624) bug in older versions of Docky and have been fixed in latest releases. Meanwhile, you can extract the helper manually:
wget -O docky_deluge12helper.tar http://forum.deluge-torrent.org/download/file.php?id=2987
sudo tar -C /usr/share/dockmanager -xvf docky_deluge12helper.tar -C /usr/share/dockmanager