Several years ago Gene Cunningham planned to make only 183 Big Bang Bars (I believe limited by Capcom PCBs he had available) and pre-sold a few less than that. We were asked to pay 50% down and then invoiced for the other 50% less than four months later. After that we were given the opportunity to order and pay in full for game-specific spare parts. I chose to order $500 worth while others ordered even more, some even going for an expensive spare playfield. We waited more than two and a half years before we got our games (and keep in mind that all Gene had to do was have components manufactured and then assemble the games because all design and programming had already been done by Capcom). A few BBBs were exported to Europe shortly before anyone in the USA got their's, because they had to be received in Europe before a ban on imports containing lead-based solder went into effect. Those in the USA got to pick up our BBBs on a Saturday in July 2007 designated by Gene as Big Bang Bar pickup day. Some people were really worried about their investment during that long wait, since Gene had never built a complete game before and he had incorporated a separate company for BBB assembly so no one could go after his personal finances or his other company should the endeavor fail.
I relate this story for those waiting for WOZ. Building a pinball machine is a huge undertaking for any company that has never made one before. JJP has had to design and program the game and create all the artwork for WOZ, in addition to everything IPB did to build BBB. Based on how long IPB took for BBB, three years would seem to be a reasonable timetable for any new company to accomplish all of this. Try to be patient. Once you have your game (with full software) the rest of us will be envious (me included, since I can't afford one).