Well, in this particular incidence for the Weaver Guild, it says a stub is allowed but doesn't explicitly refer to short challenge subs.
Anyway, I revised the Kalimon overview sub already and threw out a somewhat expanded version. I'm now waiting for Dossta's and your revotes. I haven't gone into details into the magic still (though I added a few details to clear things up a bit more) because I'm going to put out another sub devoted entirely to the topic later. But yeah, let me know how you like it and I will make clarifications where I could. But really, some of the aspects I haven't worked it out myself. Also, I have all these ideas on the World of Kalimon post-Elementallion but again, these contents seem more suited to further subs. So yeah, I'm afraid there might still be bread crumbs floating around.