I am a little confused how to use the public/non public album checkbox. If I make an album non public, how can I authorize selected users to view it?

Thanks for the reply. I unserstand now,

However, I think there is a bug in it. When you remove the checkmark from the Public bux, if you have tags assigned, the tags show up in the Tag Cloud and the album/pictures can be accessed via tags. I would think that this behavior is not desired.