I'm using the notebooks the same way I used many categories in EN2.2, as "holders", as opposed to tags/attributes. For instance, I dump recipes into the Recipes notebook, Tips into the Tips notebook, etc. etc.
What I'd like to be able to do is have subnotebooks so that I can have say Tips:Latex, Tips:Linux, Tips:Windows as subnotebooks on Tips. Yes, I can painfully accomplish the same thing with tags, but it's clunky for a couple of reasons:
1. When I want to mark a note as a Tips/Linux note, I have to: (a) move it to the Tips notebook and then ( tag it with Linux to distinguish it from