I was on the Paypal site yesterday and noticed that they have a free billpay service (I think). Looking through the list of companies that are already set up to accept Paypal, I noticed American Express. Sounds like it may be possible to fun Paypal with one mileage credit card and pay another one with the funds. What do you think? Anyone out there try this yet?

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AA, Onepass, Skymiles, Hhonors, Starwood