Tom Quinn has successfully put together a working copy of rdesktop for the IBM thin client. I have repackaged it into a tar.gz and have since tested it on my thin client.
To install download this file to your thin client in the root of the drive /
http://www.bluetrait.com/files/N2200/rdesktop-linux2200.tar.gz
then from a command line run:
You should now be able to start rdesktop by running it from /usr/bin/rdesktop.
The command I use to start it is:
Now Tom said that he had problems getting it into full screen, I did not have this problem. Let me know if it is a problem for you.
Also the key mapping for the backspace key still does not work. When I get a chance I will look into it.
If you'd like this to run on startup modify .xinitrc in root and add the rdesktop start command.