Microsoft has released RDP version 8 to the web.
You can download and find installation instructions here.
Download the update today to make your Windows 7 SP1 virtual desktop WAN ready with RDP 8 and RemoteFX. Do make sure you download and install update 2574819 before installing the RDP 8.0 update. For further instructions, please refer to KB2592687.
Good, this crashes connections to Windows XP boxes.