Hmmm, I don't think journals would be that relevant, they could probably just fit into the messages tab, as the only lengthy posts I've seen by creators is when they're explaining they're on hiatus.
Maybe a tab for just creator's messages and another tab for reader's messages (I guess that could include the thankyou messages as that's what's mostly posted by them)
The art tab can be used for creator's doodles so they don't get lost in the thankyou posts.
I really want an option though to hide the comments and likes tab away from public view though, I don't like the idea of everything little thing I do being so easily trackable. Else I'd be more re-frained from commenting or liking on other creators work which could hurt their stats
I'm also pretty sure that other readers of tapastic value their ambiguity, after all, wasn't there a topic earlier where Tapastic was explaining creators not being able to track users who've shared their content for the sake of privacy? >.>