Amazon.com Inc says it has added 42,000 classical operas and CDs to its music store, bringing total inventory to more than 200,000 music CDs. The Seattle, Washington internet bookstore reckons that’s fifteen times the number of CDs in your local music store. Meanwhile Reuters reports that CD Warehouse Inc plans to launch a web site where it will sell new and used CDs. Inventory from 300 stores is to be combined into a single database, which will route online orders to the nearest store for delivery.