I have yet to find satisfaction since I used to find webui for rtorrent. However, I recently found a nice web interface for rTorrent that was not only clean and beautiful but also contains many features. If you are interested, hurry to the following website to download it now!
I have using rtgui be a web interface for rTorrent until now, however I found a new software that is rTorrentweb. It's really a very nice tool for rTorrent even better than rtgui. You maybe want to know why I would recommend to use it.