Timeline for Apache 2 full use?

As the subject says, can anyone give me a timeline estimate for full usage (not experimental) of PHP within Apache 2.0? I ask because I am the maintainer of a server that recently got LOADS of hits, and was brought to it's knees (Hubble Space Telescope). We managed through, but during problem solving afterwards we have decided that Apache 2.0 with it's threads would have helped us greatly under our load. the problem is that we were just getting ready (in say a month) to go live with a very large PHP piece ... and if they can't work together ... well ... hrmmmm. Thanks, Eli Computer Specialist for Internet Services ewhite@stsci.edu http://hubblesite.org/