I've fallen off the face of the pinball planet of late. I've been super busy putting together a Kickstarter proposal and otherwise trying to do this whole make a living thing.
While on Kickstarter's site I discovered this project from a guy trying to build his own machine: http://www.kickstarter.com/projects/497 ... om-scratch. Maybe he'll finish before Jersey Jack (though I don't think he's putting these into production).
And if you're curious about my kickstarter, check it out here http://www.kickstarter.com/projects/bil ... e-his-book (note the sly self-promotional tactic).