Laurie Black, a 32-year-old preschool teacher from Auburn, Mass., finds herself out of a job this holiday season for the second year in a row. But she's not going to let it stop her from shopping on Black Friday.Along with a few other enterprising -- and out-of-work -- shoppers, Black is offering her services to those who don't want to stand in lines or risk being trampled on the most hectic shopping day of the year.