Mobile platforms: visual comparison of daily sales, Q2 2010
Above: estimated worldwide daily sales for each of these platforms, for Q2 2010. This does not show cumulative sales or sales growth. What it does give you is a snapshot of what's shifting on a daily basis right now.
It also doesn't tell you that Android was only selling 100k units two months ago. And that Google want to get a billion Android devices into the market.
The iPad figure is based on Apple shifting 3 million units from launch to June 21. So it would be reasonable to expect that this will decrease in time (Rupert Murdoch disagrees however, with a sweaty prediction of iPad sales in the "hundreds of millions").
Data Sources:
3,000,000 iPads in 80 Days (IPadinsider.com)
Amazon.com Says Kindle Sales Accelerated Last Quarter (Businessweek.com)
(Chart made using IBM Many Eyes, which doesn't play nice with Posterous when embedded)