Oh, there will be stone/brick buildings too. Stone/brick is good for representing "old" slums, but I want to be able to represent "new" slums as well. The sort with lots of temporary-looking dwellings built out of canvas and stuff like that, inhabited by visiting caravans and newly-arrived people from the countryside come to seek a new life (or simply refuge) in the cities. I guess this clip from the Conan movie shows what kind of feel I'm after:
Figures that there's no wattle visible in that segment

Anyway, my questions still stand. I'm not ready to give up on the idea of wattle-and-daub shanties just yet.
PS. Sorry about the Youtube clip being embedded in the message, the forum script seems to do that automatically.
EDIT: Damn! How do I get it to NOT embed the Youtube clip? This particular clip seems to have "Embedding disabled by request". I wish the forum wouldn't automatically embed the clips.