Seattle-based Internet retailer Amazon today announced the launch of a new website focused on selling mobile phones and phone plans. AmazonWireless is limited to AT&T and Verizon plans but will expand as beta testing goes on. Currently, over 120 types of phone are available for sale. The main purpose of the site, according to the announcement, is to ease the process of buying or upgrading a phone or plan by getting rid of the paperwork and rebate mailing that an in-store purchase engenders.