The SitePoint PHP blog has posted the next two parts of their series looking at using namespaces in PHP - parts 2 and 3:

In the second part of the series they build on the basics and look at importing namespaces into a script, aliasing them to a shorter, easier to use name and some rules to consider about name resolution.

The third part of the series (the last part) looks at the keywords the namespace functionality uses and how to autoload namespaced classes to keep their namespacing intact.