This smart home stuff must have legs. Wal-Mart is the latest big box retailer to glom into the trend with news out today that it will sell gear from Insteon in 1,500 of its stores around the country. The products in store will include a starter kit, motion sensors, dimmers, IP cameras, LED bulbs, leak sensors and door/window sensors among others. Wal-Mart also sells Chamberlain gear and a few other connected devices on its web site. As I’ve said before, it’s going to be a connected holiday.