Google is activating more than 500,000 Android devices a day

"Google Android chief Andy Rubin said on Tuesday that more than 500,000 Android devices are activated each day worldwide.
At Google I/O 2011, the web giant announced its Android roadmap and tools for integrating with devices and the home
Week on week, that is a growth rate of 4.4 percent, Rubin said in a post to Twitter. In May, Google announced a 400,000-devices-per-day figure, up from 300,000 per day in December.
That growth in part is due to Android handsets being widely available and inexpensive to implement, as well as offering the basic smartphone experience of touchscreen, fast processor and multimedia features. Also in May, Android's worldwide market share reached 36 percent."

Source:  ZDNet, 29th June 2011