Speaking of low-cost aerial photography, The Fiducial Mark links to a research paper on the use of kite-based aerial photography to produce high-resolution aerial imagery at a cost much lower than the usual method (which at that scale usually involves a helicopter). The idea that useful high-resolution imagery was obtained using a kite and a digital SLR — plus a modicum of software processing — is intriguing, but it doesn’t look like something for mere mortals.