The 2008 rookie tournament got underway in Kitchener, Ontario, on Saturday with the Penguins’ young talent putting up a decisive win against the Toronto Maple Leafs rookies in their own back yard.  Center Mark Letestu, signed as an undrafted free agent in March 2007, racked up 4 points (1G, 3A) in the win.  Right Winger Jean-Michel Daoust,…