Contrary to popular belief, "lefties" also have both a right and left hand.! Fortunately, most lefties were also blessed with the ability to use either hand for most every day things (we generally are much smarter than right handed people, and better looking as well).. Everything from writing, to using "right handed" scissors and yes, even shifting a standard car transmision with our right hand!
So, you see, most lefties probably "manage" with the blackberry, and most everything else in life better than rigth handed people.
Unfortunately, lefthanded people have a life expectancy that is less than that of right handed people, due to accidents for the most part.
This usually results in something being said such as... "opps, should have realized that was backwards for me"
followed by.... BOOM