I have a business idea where I accept payments of a dollar or less. I thought about using paypal to accept credit cards, but the charge $.30 per transaction. If I accept a payment of a dollar, than paypal takes 30%! Is there a company that accepts credit cards without a transaction fee, and just a straight percentage?

No such thing. Lately they all seem to be at least 25 cents. Some may be less, but no a lot of them.

Google checkout charges .20, and for every $1 I spent on Adwords, I get $10 in transaction fees. So, check me here,
1) I get 100 transactions of a dollar each, which comes to $100.
2) Google takes 2% and $.20. Transaction fees would come to $22.
3) I spend $2.20 on Adwords, leaving my total transaction fees to be $2.20.

Do you think this $1 to $10 is just a promo thing, or will be forever?