If you are an iPhone user, then you might want to check out uTorrent WebUI for the iPhone. The iPhone WebUI allows you to add new torrents, pause and resume existing downloads.
The iPhone UI also shows details such as the download/upload speed and the number of seeds and peers connected to the torrent, which should be enough to track the progress of your downloads while you are on the move.
The current feature set of the iPhone UI for uTorrent is nowhere near those of the regular WebUI, but it does run pretty well on any iPhone. It requires the uTorrent WebUI to be installed in order to get it running, for more detailed installation instructions visit the iPhone UI homepage.
If you want to run uTorrent on a mobile phone other than the iPhone you could give uTorrent mUI a try. It is a lot less sleeker than the iPhone UI, but the interface does the job, allowing you to manage your Torrents from any mobile phone browser.