First, thankyou all for the Adsense education.
After about 6 months of Adsense, my site started to make (very) small money, so I came here, got excited, learnt heaps, went and changed everything (tried to hard?) and the site promptly disappeared from G's results. It used to be < 5 for all chosen keywords. 2 months later, it reappeared in good position on this DC 72.14.207.104, which I found in here. Now for the last week, it's in google.com at night and gone of a day, but always on 72.14.207.104. Its like an Adsense switch. On at night, off during the day. Do you think I have something wrong? Is this normal? What is this DC setup all about?
Thanks for any hints.