Here are some highlights from the most recent AdMob metrics report, released a couple of weeks ago:

• The story in March is Android. The HTC Dream (aka G1), while still the 10th most popular device (4th in smartphones), is showing impressive growth of 47% on average between November '08 and March '09. With more Android handsets on schedule for release in 2009, it could be a huge year for Google's infant OS.
• With an increase of 17% over February, requests continue stellar growth. However, a higher percentage than ever are coming from mobile applications, rather than websites.
• Requests from the US increased nearly 4%, while all other top countries decreased or had minimal gains in March.
• Apple's iPhone and iPod Touch continue stellar growth in the worldwide handset market, each increasing market share 2.1%, while all other handsets had minimal gains/losses +/- 1%.
• Samsung took over the #2 spot in the US for most requests at 17.6%, formerly held by Motorola, who saw a decrease of 1.6% to 16.8%.

The following stats are based on 7,654,044,490 requests:

Top 5 Countries

1. United States (47.5%, +3.9%)
2. Indonesia (9.2%, -5.1%)
3. India (7.6%, +0.2%)
4. Philippines (3.9%, 0%)
5. United Kingdom (2.9%, 0%)

Top 5 Worldwide Handsets

1. Apple iPhone (13.3%, +2.1%)
2. Apple iPod Touch (8.8%, +2.1%)
3. Motorola RAZR V3 (2.7%, -0.2%)
4. Nokia N70 (2.1%, -0.3%)
5. Samsung R450 (2.0%, +0.7%)

Top 5 US Handsets

1. Apple iPhone (17.0%, +0.6%)
2. Apple iPod Touch (12.1%, +1.5%)
3. Motorola RAZR V3 (5.0%, -0.8%)
4. Samsung R450 (4.2%, 1.2%)
5. Blackberry 8300 (Curve) (3.3%, +0.2%)

Download the full report here: http://www.admob.com/s/solutions/metrics