Google.com

Multiple Accounts

Just wondered about this... I know you're only suppose to have one Google Adsense account. But what if you had a personal account and on top of that you have a "business account?" You know, an account for your business. What if this second account was just an account for one of the websites you run?

What do you think the advantages and disadvantages of running multiple Adsense accounts are?

If you have been involved with optimizing or promoting your website, you would have often searched your prominent keywords in search engines like Google to check where your site ranks. If you have to deal with more than 20 to 40 keyword phrases, checking your site ranking in the first 30 results, across 10 major search engines can be a daunting task.
http://www.redalkemi.com/articles/site-ranking-on-google.php