http://code.google.com/android/
http://www.google.co.jp/mobile/android/
http://gigazine.net/index.php?/news/comments/20071106_android/
http://android.siprop.org/
http://www.atmarkit.co.jp/news/200809/13/android.html
http://www.atmarkit.co.jp/news/analysis/200809/29/android.html