[Dovecot] Public folders using NAMESPACE

Howdy folks!

I've been trying to research how to (or if possible at all) implement public folders using the namespace feature on a server with multiple virtual domains. After about an hour of looking around I'm a little confused. :) I guess there are two questions:

1. Is it possible / does it work?
2. If yes, does anyone have a sample configuration or write-up of How You Did It[TM] to share?

I've been mainly focusing on the thread from here:

http://www.dovecot.org/list/dovecot/2006-June/013683.html

and the wiki ACL documentation:

http://wiki.dovecot.org/ACL

but I'm having a hard time piecing it all together...

Thanks for any and all tips!

--Jo