TORONTO – Satellite radio company XM Canada saw its first quarter of fiscal 2008 revenue double to $8.1 million, as compared to the first quarter of fiscal 2007, the company announced late Monday. For the three months ended November 30, 2007 (as reported last month by Cartt.ca) its subscriber base reached 350,300, an increase of 86% over the end of Q1 last year. Self-paying subscribers grew by 110% and the company’s “adjusted operating loss” improved by $2.3 million to $10.5 million. The total number of vehicles with factory-installed XM satellite radios on the road or on order increases to 303,000....