I love Transmission BT client on my Ubuntu Server. However, I hate it’s web UI. Searching on the web I found an excellent UI for it. It’s called Transmission Remote GUI, and can be downloaded here. This UI is a “thick” client meaning you will need to connect to Transmission Server using this software installed on your client machine. In my case, I am using my Windows box to connect to Transmission Server using this wonderful GUI.
Look and feel wise, it’s similar to uTorrent. See this link for some screenshots.