On the Zend Developer Zone today, Cal Evans has another of his interviews with the speakers at various PHP conferences, this time, it's with Theo Schlossnagle of OmniTi.

This is another in a series of interviews I’ve been conducting as I travel to different conferences. Most of the people I get the chance to interview are directly involved with PHP in some way. This interview is a bit different. Theo Schlossnagle is the founder of OmniTI, one of the premier PHP consulting companies in the world. OmniTI consults with companies all around the globe on issues ranging from architecture to security.

Cal asks questions about the background of OmniTI, how they find/retain programmers, Messaging Systems, Theo's book, scaling in general, and some of his thoughts on what PHP still has to overcome.