I have checked the groups plugin. I could use the 'group' type and subtype it 'journal'. I think I would be following elgg philosophy better. In that case, the journal would appear in the list of groups (Not complettely what I spected). Does eanyone have a recommendation?

Thank you all!

I have creted a ticket here:

http://trac.elgg.org/ticket/4501

Miguel - I've updated the ticket to reflect the actual debate the team will have about implementing your changes.

Using an ElggGroup entity is a possibility, but yes, it will show up in the list of groups. You will need to override the groups page handler to change it. This is intentional behavior. There's a ticket about that here: http://trac.elgg.org/ticket/1987