New set-top boxes offered by online streaming company Roku Inc. are now available at Best Buy and Future Shop locations in Canada, the company said. In a release Thursday, Roku said two devices, the Roku 2 XD and Roku 2 XS, are now available at Canadian Future Shop and Best Buy stores. The Roku 2 XD model is available for $90 and the Roku 2 XS sells for $110, the company said. Roku said in January that its online streaming platform offers more than 700 channels and applications....