Wizpert (http://wizpert.com), which is currently in private beta, is a service that provides people with direct and instant access to experts in specific fields (PHP Programming being one out of a very wide variety of topics).
Currently, you do need to sign up for an invite to use the service. I’m not sure how quickly the turn-around is on that at the moment, but it is worth checking it out.
Being that I am most proficient in Magento and that’s where I spend most of my time, I have requested that they create a Magento topic, but that is still pending.
They also recently featured me on their blog with an article I wrote for them. You can check that out here: http://blog.wizpert.com/learning-by-example/