uController for Windows Phone 7 allows you to control your torrents from anywhere in the world. It will also notify their progresses through live tiles.
With uController, you can start, stop, pause, delete and add torrents. You can also get notified when a new torrent is added and turn on live tile updates to show you how many are currently downloading. It also supports Enhanced tombstoning.
You need to install uController Service application on the computer, which can be downloaded from HERE.
Get the app for WP7 from HERE for $1.29.