I ran the scripts from the wiki:

cd /tmp
wget http://65.49.60.197/oztivofiles/updates/upgrade_oztivo
# At this point, you can read the upgrade_oztivo file
sh upgrade_oztivo.

I have now found, however, that I can no longer access the TIVO via TWP or Telnet, etc. Not sure if this is related to the upgrade, or the fact that I assigned a static IP afterwards by running the nic_config_tivo script.

I get the Static IP address displayed following a reboot, but can't ping the address or connect to it in any way.

Any hope?