If you’ve ever tried to make an Arduino shield at home using a 1-sided circuit board, you’ll appreciate how difficult it can be to both solder connectors onto the bottom side of the board and components to the top. It’s possible to use extra long headers that you can stick through the top, however I like Stephen Hobley’s FlipShield idea better. He decided to turn the problem around, and instead of making a shield that plugs into an Arduino, he created a board that you plug an Arduino onto. This solves the connector problem, since the components are now on the same side of the board as the connectors. In addition, it also allows you to make shields that are larger than the Arduino itself, which can come in handy!
Anyone want to guess what the board he is making does?