I\'m sure this is a stupid question, but I can\'t find a link anywhere and their wiki just says \"Copy the AdMob Jar file into that libs directory.\" but not where to get it.
You have to register at http://www.admob.com/register/.
Then after activating your account, you need to config one application in your acccount. After that against that application Admob will provide you the Android SDK for Admob
containing admob.jar and working example (LunarLander).