I'm pretty happy with the C860 running Cacko 1.23. I've only got one problem now, it's with the CE-AG06 camera.
It takes reasonable pictures with the software version included in the Cacko feed; the problem arises if I try to go to fullscreen with the viewfinder window. The Z immediately locks up and won't even suspend! I have to do a pull-the-battery reboot to get it going again. The software version is qpe-camera-ja, for reference, probably qpe-camera-ja_1.5.08_arm.ipk .