Remember that movie The Holiday? Strangers Cameron Diaz and Kate Winslet are both single and incredibly hot, and they connect on a house-exchange website, vacation at each others' homes in LA and Surrey, and find love along the way? ABC is doing a reality-show spin-off of the extremely realistic romantic comedy -- and it's casting here in Houston.The pitch: "This is your chance to jump into a different life in a different part of the country. A romantic holiday completely planned and organized j