Welcome aboard, Dunamin! I'm happy to see my shameless plugging worked.
We had discussed using official campaign settings (WotC settings specifically, but I think the idea goes to 3PP as well), and the trouble is that we don't own those settings, so posting lots of information about Cormyr, for example, could get us in trouble. There's also an increased sense of ownership in playing in a world created by the community.
Looking more at IEC, it looks like it's trying to do the same thing, actually. I don't think we want to make the gith the focus of L4E, but it looks like IEC would be okay with us stealing some of their ideas.
That said, since you love the gith, give our gith entry a look and add to it!
http://www.enworld.org/wiki/index.php/L4W:Character_Creation#The_Gith
And again, very happy to have you involved!