http://online.wsj.com/preview_login.html?url=http%3A%2F%2Fonline.wsj.com%2Farticle%2FSB117746506116181425.html%3Fmod%3Dyahoo_hs%26ru%3Dyahoo By Jessica E. Vascellaro: Research In Motion Ltd. and Verizon Wireless today plan to announce the launch of a BlackBerry "World Edition" smart phone that enables Verizon customers to roam on overseas networks thanks to a dual-mode chip that is compatible with both Verizon's technology and wireless technology prevalent overseas. The device, which will cost $299.99 with a two-year contract after a $100 rebate starting May 14 online and May 28 in stores, is aimed at solving ...