goood advice, i thought they only registered the ip from where you made your account...but i see that there is more to this, ok good to know
it's better to use google desktop itself, it also comes with adsense plugin, and it's really accurate in real time, you generate impression, within 5 seconds they will show the impression generated, plus with many more function, news, stock quotes, etc, ohh i use to monitor google stock everyday.