Amazon is building more brick-and-mortar stores and beefing up Prime membership perks, company CEO Jeff Bezos has confirmed at the company's annual meeting for shareholders. At the moment, the mostly online-based retailer has a single bookstore in Seattle, but it's already building a new outlet near San Diego. "We're definitely going to open additional stores," he said, "how many we don't know yet." It's unclear if the new location is going to be another bookstore or if it will be selling other items, as well. If you'll recall, reports came out earlier this year that the company could open other types of retail outlets.