Redundant Terminal Services Servers

thundergeek writes: The company I work for is purchasing thin clients, lots of them! I am responsible for the integration of these thin clients into a redundant failsafe server system consisting of two server 2k3 servers (not my choice) on an Active Directory domain. I want to know from the rest of you admin geeks how I should go about creating some sort of rsync between the two which mirrors, in real time, all the session data created by the clients. What needs to happen in the event of a server failure is a seamless transition to the back up server with minimal data loss and down time. Is there a software solution, or an easy robocopy hack?