Mobiletuts+ is all about quality tutorials for mobile developers – all mobile developers. Topics will include native development with the iPhone, Android, Windows and Blackberry platforms, cross-platform development with tools like Appcelerator and Phone Gap, and techniques for building mobile accessible web sites with HTML 5.
OpenPlug Studio
http://developer.openplug.com(an Alcatel-Lucent venture?)
OpenPlug Studio is a free tool for mobile and tablet applications development.From a single code base you can now build for all platforms and get the best of web development plus a native user experience in your apps.
In-App Payments
http://developer.openplug.com/index.php/resources/docs?videoid=44
Android
Hello, World
http://developer.android.com/resources/tutorials/hello-world.html
Managing Virtual Devices
http://developer.android.com/guide/developing/devices/index.html
In-App Billing
http://developer.android.com/guide/market/billing/index.html
http://www.javapassion.com/tmp/android_stepbystep/