This is just a generic installation, and it's what you get if you install the RDP web client on any IIS server. From this page, you can type in the name or IP address of any Terminal Server and click "connect." The page will install the TS ActiveX control if you don't already have it. The RDP connection is established directly from your client workstation to the Terminal Server--it doesn't go through the web server at all. This means that you can even use this page to connect to internal servers that are only available to you via NetBIOS names.
So, if you have never seen Microsoft's RDP client for the web, or if you ever need a quick an easy way to connect to any Terminal Server, check out www.brianmadden.com/tsweb.