airbrush tutorials on RCGroups. Be sure and look at the first three posts. More here. And a store-bought checkerboard stencil.
here. Very interesting, and it can save on some projects. Ebay searchage for "U-blox PCI-5S" and "GPS Ceramic Internal Patch 1575.42MHz Antenna 20x20x7mm" about $15 combined!
here. Using the JeeLib to access the Atmel low level sleep functionality.