Comscore reports (via AdMob):

• there’s now 45 million smartphone users in the US, up 21% in the last 3 months
• Google/Android is the big winner, having over doubled its market share to 9% over the last quarter
• RIM and Apple hold stead in terms of share, meaning their absolute numbers are still growing
• Microsoft and Palm are the big losers, and are likely to continue to do so

Discover Anywhere Mobile notes:

• the rapid adoption rate of smartphones is a sign that many people are choosing to replace their cell phones with something more modern: expect smartphones to dominate the market in the next 2 to 3 years
• we expect Apple to start growing market share again after they release a version that does not depend on the AT&T network
• Palm blew it
• Microsoft will make a recovery next year after Windows Mobile 7 becomes available, but not until its share drops to Palm-like numbers

We noticed last week at the WACVB Destination Marketing Tech Summit that there were a lot of Androids amongst DMO attendees – not as many as iPhones, but still a remarkable number.

The latest AdMob numbers tell the story:

AdMob serves north of 10 billion ads per month to more than 15,000 mobile websites and applications. Thus, although its data is about ad rather than page impressions, it can be taken as a pretty robust indicator of how web usage habits are developing and changing over time. Android is the big standout of its most recent figures, with Google loyalists now constituting a cool 42 percent of AdMob’s smartphone audience in the US.

Given the trend lines, the Android’s probably in the #1 position by now and is likely to maintain it, at least until Apple introduces a version of the iPhone that’s not dependent on the somewhat flaky AT&T cellular network.