This example is from the Straits Times Life! supplement (13 September 2008).Unless the writer is referring to the fruit, he needs to write Blackberrys (name of electronic device). Similarly, we write the two Germanys; I know three Jerrys; He had two Bloody Marys.
It seems spelling is not this writer’s strong point (he is, incidentally, a British native speaker of English). Here’s another blunder from a year ago (Weekend Today, 18–19 August 2007):
Make it formerly, not formally.