An alpha 2 build of rdesktop version 1.5 has been released (3/18/2007). This is a free RDP client which you can use to connect to a Windows NT/2000/XP Terminal Server. Unlike earlier builds, it uses SDL and does not require XFree86/OS2.
http://glebk.newmail.ru/rdesktop/
Source: OS/2 Warp News and Rumors