It's no secret that the smart phone market has been an all-out war recently. Apple has been viciously taking market share from all vendors, although RIM (Blackberry's parent) still holds on to a commanding lead. Take a look at the viz below for more details.
About this Viz
The real story here is the decline of Palm. Once the all-out leader in hand held devices, their market share has been eroded to almost nothing over the past several years.