Worked for me...
Guys, just yesterday I managed to UNLOCK my fiancee's HTC ChaCha and then get a root (not sure if perm or temp) using the approach explained here:
http :// www . computertechplace . com /unlock-and-root-htc-chacha/
Please remove the spacing above as I can't paste links just yet.
The "DooMLoRD_v4_ROOT-zergRush-busybox-su" file supposedly managed to root the device and I did have superuser installed once I rebooted. Also managed to get ClockWorkMod Recovery installed and removed some bloatware from the device, though not 100% sure I did it correctly - will be looking into that further.
Anyone else managed to work with that?