Google Adsense is celebrating its 10 year anniversary this month. Google first introduced the service sometime in June 2003 and is now one of the biggest money-earner for the company and the millions of Adsense Publishers like us.
I remember applying for Google Adsense back in february 2004. Back then, blogs are actually not allowed to run Adsense so I registered for a portal/forum that I used to run.
Two years later, in 2006 I earned enough from blogging (90% Adsense) to be able to buy my first car (see story here). I think most bloggers first got their earnings thru Google Adsense and it still remains as the biggest source of revenue.