It seems to have been out for a while. Does anyone have any experience with FPS? I'm launching a new project soon and the one thing left is payment processing. I'm scared to be tied to just PayPal and am looking into Google Checkout and Amazon as well.

I know, I know, just get a merchant account. And I will. But this is not really a startup or company and much more of just a small idea I'd like to test out. Ideally, if it picks up steam, I'll switch over to a real merchant account.

isn't merchant account US only?

Seems like a pretty significant disadvantage for an internet business.

Not necessarily. There are international providers. Authorize.net, for example, allows for international payments.

I believe buyers need an Amazon account or Amazon FPS account to use Amazon FPS. How about an alternative to just accept CC# like Paypal's Website Payments Pro? (without needing a separate internet merchant account)