In Windows 7 (and previous versions for that matter), you can change the port that RDP listens on for new Remote Desktop connections. To do so you would fire up regedit and then browse to the following key:
HKEY_LOCAL_MACHINESystemCurrentControlSetControlTerminalServerWinStationsRDP-TcpPortNumber
Here, you would change the PortNumber to a new decimal value that is the port you wish to listen on. Save, reboot and you’re good to go.