Project organization in Xcode4

How do you organize your Xcode4 projects?

1. With reference to groups/directories in Xcode vs. on Disk
2. With reference to SCM (I'm using Subversion for my projec开发者_如何学编程ts)

I'm looking for something similar to this (which is for Xcode3).

Marking marcus's comment as the answer:

Actually you can take the information from your link and go ahead using the same approach on Xcdoe4 projects. There is not big difference when it comes to disk location and SCM. Besides this I more prefer a module-wise organisation (so Controller, View, Model classes used within the Controller all go into one subdir)