No, but now I want to try it.
I've used VVA and RDesktop successfully.
I've had to resort to the Amiga at one point - a brother of mine in NY had problems; I had him install UltraVNC. Tried to connect with the Windoze box(es) I have, neither worked. Jumped on the A4k, worked like a charm!
Now I just HAVE to give AVNC a try.