Here's the only other exploit I currently know of.
1. Drop down the channel list box.
2. Click a new channel.
3. Immediately start running forward. You will be moving forward on your screen, but appear to be still to other players and even the server.
4. Cancel the channel change before the 5 seconds is up.
5. The server will recognise the position change and you will appear to have "teleported" to your new location.
This is seriously useful for getting past mobs that are blocking narrow entrances.
Enjoy!