liveuser status

Hi, I have an application with 60 users, 20 groups and about 90 different sections. Right now each group has read, write or no access to the sections. In the future I'd like to expand this to being able to assign more right to groups and also to individual users. LiveUser sounds like and can do all that quite easily. I was wondering what the current status of LiveUser is. I know the official status is beta but since it is being used on a number of sites I think it's probably fairly stable. Does that also hold true for the the postgresql container? (I use PG with MDB most of the time) TIA Jeroen