The union, which is not the official union for Wal-Mart employees, is calling on the store to stop retaliating against employees who they say are looking for better pay and fair treatment. Wal-Mart workers are planning nationwide walkouts on Black Friday, which is largely seen as the biggest and most profitable holiday shopping day in the U.S. The chatter on Main Street (a.k.a. Google, Yahoo! and other search sites) is always of interest to investors on Wall Street. Thus, each day, TheStreet compiles the stories that are trending on the Web, and highlights the news that could make stocks move.-- Written by Brittany Umar.