This week, Editor-in-Chief Elliot Williams and (former Assignments Editor) Kristina Panos stood around talking about the greatest hacks of the previous week. But first, we've got a contest running now through March 21st -- the Low Power Challenge! Kristina almost got What's That Sound this week, but could only describe it as some sort of underwater organ, so still no t-shirt for her. But [BalkanBoy] knew exactly what it was -- the Zadar Sea Organ in Croatia. Then it's on to the hacks, beginning with the most beautiful sea of 7-segments you'll likely ever see. We gush over a tiny PC in a floppy drive that uses custom cartridges, dish about an expressive synth that uses a flexure mechanism, and enjoy a loving ode to the vacuum fluorescent display.