this is an interesting one from ben. it's not a hack, but a virtual hack!
he says, "i made, not exactly an ikea hack, but a virtual ikea hack. it's a vr cave environment where you get to cross-breed ikea (for example, leksvik desk + billy bookcase) to get these strange mutations and constructivist sculptures.
oh, actually there is kind of an ikea hack in there. the projection screen is a 2-projector stereoscopic immersive display. one of the challenges in setting up these VR systems is precisely aligning two video projectors; usually they're stacked, and have to be very carefully angled so the images map up. there are slide projector racks out there that do this, but they're really large, and not so easily available anymore; and VR is such a niche market that there are not many products specifically for this. we got a 1' x 1' shelf and 4 metal legs (about 6" long) with threaded feet for adjusting the height. i think they were for an entertainment center or something. this makes a very nicely adjustable projector rack."
see more pictures of it at www.bcchang.com