Hi Malte, Faizal,
This is a great effort and will be very useful.
I have a question which I've gone through and I think most newbies also go through this question. I am not sure if this will fit into The Book so I will ask it here first:
What is the best way to extend the user data model? I like the idea of having ready-to-use user registration functionality, but I like to capture additional info from my users - for example, favorite pet, city of residence, etc. What is the recommended practice to accomplish this?
If you think this fits into The Book I'll scour through the forums and try to contribute this item.