Ad network AdMob issued its June 2009 Mobile Metrics Report this morning. It focuses on the geographic distribution of iPhone and iPod Touch owners (Apple said in its recent earnings report that there are 45 million globally.) Here are the top-level findings from the June report:

• 54 percent of iPhone and iPod touch users are in the United States
• Following the U.S., France, Germany and the UK each had more than five percent of all iPhone and iPod touch devices
• iPod touch users represent 38 percent of total iPhone OS devices in North America
• Requests from the Android OS increased 25 percent month over month. Android has five percent worldwide OS share and is slightly ahead of Windows Mobile for the first time

Here are some charts from the report:

All of this must be qualified by the fact that this data comes from AdMob's network, which is not identical to the mobile Internet as a whole. However it's a large network and directionally consistent with mobile Internet trends more broadly.

The distribution of iPhone/iPod Touch ownership and usage is interesting to be sure but the bombshell in here is the data that Android-based usage is now bigger than Windows Mobile, this despite only one device (effectively) in the market for Android. This underscores the competitive urgency for Microsoft to get WinMo 6.5 and 7 into the market.