Ask HN: Best solution to accept micropayments

I was wondering what the best solution for accepting very small payments (lets say 1 dollar). I've looked at some of the bigger names and the results have been less than ideal, with the best possibility leaving me with only 78 cents of the original dollar.<p>Examples for 1 dollar - Wepay: 3.5% with 50 cent minimum = 50 cents Mpayy: 2% + 20 cents = 22 cents Google Checkout: 2.9% + $0.30 = 32.9 cents Paypal: 2.9% + $0.30 = 32.9 cents<p>Is there anything out there that offers a more optimal fee structure for 1 dollar payments? Can someone explain to me what the "behind the scenes" fees would look like for charging a buck on a visa or mastercard?