I am also having trouble with TM. I can access my shares on the NAS but TM won’t recognize the backup drive on MyBookWorld. Pre-Lion, I had two MyBookWorlds mounted in FInder, one for the share folders and one for TM backups. Now the second one (backup) is gone and TM has nothing available for a backup. I also had problems accessing Twonky but after several resets, reboots and cycling power on my router, I’ve been able to access Twonky. As other users have mentioned, I also experienced the CNID DB error. 2 errors to be precise, when I first updated the MBWE firmware. They have not reappeared.
Mac OS X 10.7.2
MBWE II Firmware - 1.02.12