The pie chart shows the current proportions. IMO, the trends are more interesting.
[table="width: 600, class: grid"]
[tr]
[td][/td]
[td]May 2012[/td]
[td]Now[/td]
[td]Increase[/td]
[td]Compounded monthly increase (2 months)[/td]
[/tr]
[tr]
[td]BlackBerry[/td]
[td]2300000[/td]
[td]2400000[/td]
[td]4%[/td][td]2.2%[/td]
[/tr]
[tr]
[td]Android[/td]
[td]450000[/td]
[td]500000[/td]
[td]11%[/td][td]5.4%[/td]
[/tr]
[tr]
[td]iPhone[/td]
[td]250000[/td]
[td]250000[/td]
[td]0%[/td]
[td]0%[/td]
[/tr]
[/table]
[table="width: 600, class: grid"]
[tr]
[td][/td]
[td]April 2011[/td]
[td]Now[/td]
[td]Increase[/td]
[td]Compounded monthly increase (15 months)[/td]
[/tr]
[tr]
[td]BlackBerry[/td]
[td]1000000[/td]
[td]2400000[/td]
[td]140%[/td][td]6.0%[/td]
[/tr]
[tr]
[td]Android[/td]
[td]100000[/td]
[td]500000[/td]
[td]400%[/td][td]11.3%[/td]
[/tr]
[tr]
[td]iPhone[/td]
[td]150000[/td]
[td]250000[/td]
[td]67%[/td][td]3.5%[/td]
[/tr]
[/table]
So Android's still growing faster than BlackBerry or iPhone.