He will be releasing a new version of the firmware shortly but I don't know how many bug fixes/issues have been resolved in it. :) As a side note, I believe with all releases above 1.02.21 give you DVD menu navigation which would be very handy for me, but 1.02.21 has too many goodies for me to leave it.
EDIT: By the way, are you running the Ext3 firmware?
The wiki pages and general WDLXTV documentation is the responsibility of the users!
The developers have limited time to play with new features and to work on the code and integration, so they usually don't want to spend more time writing documentation.
It completely changes the look and feel of the WDTV Live and the developer is now working on adding more features to it. Im using the custom firmware too and wondered if you may be able to answer a question for me.