In Insert Coin, we look at an exciting new tech project that requires funding before it can hit production. If you'd like to pitch a project, please send us a tip with "Insert Coin" as the subject line. We can't say a smartphone-connected sonar fish detector ranks high on our must-have list, but man is it a cool idea. Friday Lab's taking the plunge with its Deeper Smart Fishfinder -- a spherical waterproof device that beams back individual fish depth and location info, along with temperature and floor depth to your Android 2.2+ or
