here's a real rig - called pixelorb - costs about $13,000
http://www.peaceriverstudios.com/pixorb/index.htmlthey used it for the 17 gigapixel yosemite pano here:
http://www.yosemite-17-gigapixels.com/and then check this one out:
http://www.xrez.com/yose_proj/yose_deepzoom/index.htmlzoom in and once you see little pix, keep on zooming right into those. Mouse wheel is fastest to zoom