Hi. I have one question for you. I want to put adsense on one page from two different accounts. For example 2 ad units from my account and 2 ad units from my friend's account. Is that against TOS. plz HELP!!!
It is against TOS. You should not have more than 3 units per page. You should not have more than one publisher code per page unless you specifically requested and were allowed to do so. You can use an Admanager like OpenX to rotate the ad code though. So both publisher code can be displayed, but never on the same page together.
I agree it is against the google TOS and you should correct this asap before google "corrects" it for you
I am not sure about using 2 different accounts, but I am sure that more than 3 ad blocks are definitely against the TOS. As some of here are suggesting, it's better to use a single account and obeying their rules.