Bitcoin: The Quants Dream.

[neptop]

I think it would be more like that:

"Pay Button" with an URL like bitcoin://<address for THIS transaction>/<price>

Then a popup comes up, where you can enter a password for your wallet and then you can verify your payment. Amazon knows what you are paying, because the address has been generated for this transaction.

Well, maybe it will be based or HTML, hay if Bitcoins succeeds it could even make its way into HTML. By that the HTTPS certificate also proves that you are really paying Amazon and not a phisher or something.

Of course this doesn't have to be an URI. Thanks to HTML5 we have tons of way to implement this. Think about Microdata! All this is pretty much possible right now. We just have to implement it. Shouldn't be too hard. Will probably do so later.

Also we need more libraries for Bitcoin. So every developer out there can think about and implement nifty things.

[memvola]

Then when you pay by bitcoins on amazon, after generating a new sending address, you tell amazon from what address you will be sending them payment, they associate that address with your account

neptop is right, "From" address is not applicable for Bitcoin in the ordinary use case. You can achieve it but it's not very convenient. That's why a unique address is generated on the merchant side for each transaction in order to match trades to payments.