In a recent interview posted on the O'Reilly Radar site, Msc Slocum talks with Kevin Tatroe about what Facebook's HipHop means for business.

Facebook's PHP overhaul, HipHop, reportedly cut CPU usage on the company's servers by around 50 percent. You don't have to be a programmer to understand that kind of result. [...] asked Kevin Tatroe, co-author of O'Reilly's Programming PHP, to weigh in on HipHop's functionality and its broader applications.

Mac starts with some basic questions - how will it help developers, how will it help businesses - and then asks for some clarification as to what the project really is and how difficult Kevin thinks it will be for companies to adopt.