tested the following connections...
xp<-->xp
xp<-->2003
xp<-->vista
xp<-->2008
...in both directions.
works good on xp, 2003, 2008. good work!
-i had some performance issues running on vista with aero. "aero_disable" apllication deactivates aero desktop but performance is still very bad.
-uac is disabled as expected
tested with vista business and ultimate x64
-i am missing some information in the mini-gui. status is always showing the same, session-id is not shown
-in some cases it takes some time to establish the connection (i've seen this when connecting to vista desktop), the viewer window is open but another "accept-connection"" is shown, clicking yes or no both results in closing the session and reconnect