None of the stories about potential bidders for Blackberry mention the <i>Investment Canada Act</i>. Essentially, because of its size, any foreign bid for Blackberry would have to be approved by the Canadian cabinet. The Act has only been used twice, but it's a possibility.<p><a href="http://en.wikipedia.org/wiki/Investment_Canada_Act" rel="nofollow">http://en.wikipedia.org/wiki/Investment_Canada_Act</a>