That's a good idea. I was going to suggest this sort of tutorial to Karl. Sort of a pre-release look at namespaces in PHP for those who have no to little idea about them. I'm sure the PHP nightly releases will have namespaces in them by now.
The man who comes back through the Door in the Wall will never be quite the same as the man who went out.
An overview of the namespacing within PHP can be read in the source code (likely to be changed). I look forward to the wider availability of namespaces but not the teething period as people start to implement them into their code.