Script Summary: Let's you download torrents using uTorrent remotely, from your browser.
This script assumes that you are running uTorrent with the WebUI extension.
Instructions on how to set uTorrent with WebUI up can be found here:
After installing the script, you need to go into the Greasemonkey menu to "Manage User Scripts" then edit "Add Torrents to uTorrent" to configure it. You will need to provide the hostname, port, username, and password for your uTorrent WebUI.
The result looks like this on Mininova, for example: