But I still can't see how to create nodegroup. I think that's what I meant ... I think that is how perlmonks & javajunkies oragnizes things ...

No, they don't use nodegroups (example of a nodegroup is monkpics). The main thing ENoteAndPreview provides you with (besides all the htmlcodes, documentation, display page, etc) is a note nodetype, and shownote, a "htmlcode" used by the "note display page" to show the threaded view.

At perlmonks, all nodes that are in the Meditations section are of type perlmeditation (extends document).

To get something like you see when you visit Meditations, you have to write the code yourself. Basically it consists of getting a list of desired nodes and then calling the appropriate nodemethods/htmlcodes/whatever... to format it as desired.

Yup, ENoteAndPreview is kinda basic, although i'm sure examples can be found somewhere... maybe you can become pmdev, or an edev^[*] so you can look around.

If you're looking for a chatterbox, doulopolis has a good one (its more like the e2 chatterbox).