Mobile Advertising Platform AdMob said today it has started serving mobile ads to applications built for the the Google (NSDQ: GOOG) Android operating system, including the T-Mobile G1. AdMob said AccuWeather, Jirbo, and TapJoy are already using the service. AdMob is not the first to provide advertising to Android applications, but it is claiming that it has beat Google to the punch by offering the service before they did. Ali Diab, AdMob VP: “We are already seeing strong interest in developing applications for Android-based devices, similar to what we saw with the iPhone last summer, and are very excited to take the lead in helping developers monetize their applications on this fast-growing device platform.” AdMob said it is also serving ads to mobile sites on Android and recorded more than 27 million requests in December. That compares to the 668 million worldwide iPhone requests and the 4.6 billion overall requests.