Finally answered my own question, YES there is a working vnc server that runs on the C760/C860 with the Cacko ROM (v1.20) and other Sharp type ROMs. You can get it here:
http://member.nifty.ne.jp/kayoko_abe/tsuyo...700-0.4_arm.ipkNow, to get it working first install it as normal using the regular Add/Remove software GUI on the Zaurus. Then reboot. Then click on the icon (one of 4) that says VNC password and set a password. Then hold your stylus down over each of the 4 vnc icons and be sure you uncheck the display with magnified screen option. Finally, click on the VNC server start icon. Works great for me except with old 5500 series programs that have the display with magnified screen option checked. As long as you uncheck the display with magnified screen option it seems to work fine. Really nice I think.