Everyone who regularly visits my blog knows that I'm a complete fan of the ZendServiceManager component. It is always my choice to deal with dependency injection in any kind of project, more now that v3 has been released, which is faster and has a better public API.
The workflow while working with the ServiceManager is usually the same. You create a factory or abstract factory that creates a service and then you register that service into the ServiceManager itself. Of course you have to optimize your code, and you should try to reuse the same factories whenever possible, and try not to abuse of abstract factories and initializers.
He points out the main problem with using services like this in a larger application, namely that you can end up with a large amount of them, making them difficult to manage (and find problems with). He proposed solution uses this library to minimize the amount of code needed buy injecting dependencies into the service based on "inject" annotations. He includes an example of this functionality in action and includes a few things to keep in mind using the package (like the slower parsing of the annotations some limitations it currently has).