Almost a month ago we reported on our exclusive trip to the iRobot headquarters and teased about the iNGENIOUS Challenge but never really said much about it. Well the day has come and I can now let the cat out of the bag, which I hope will encourage all of you to whip out your thinking caps. So what exactly do you have to do? Send us a great idea – big or small, creative, or even inspirational. The goal is to think of an ingenious idea that is also practical in execution. Do you have an annoying problem that you deal with every day and you have a solution…