In the process of gathering somewhat innocent behavior data, mobile wallet projects will also gather card numbers, personal identities, spending data and other sensitive information.

FORBES: Paying With Your Data: The Real Promise Of Mobile Wallets

With Adyen, merchants can focus on expanding their global reach by giving customers more options for online and mobile payments and keeping their credit card data safe.

FORBES: Bringing Trust Back to the Table - Part One: Adyen and Mobile Payments

Your mobile phone, acting as a store of your credit card data, sends it wirelessly to a nearby receiver, which could be another phone, a dedicated terminal, or a payments module embedded in, say, a vending machine.

FORBES: Mobile Payments Systems Cut Both Ways

Mandated data roaming could introduce a substantial wild card in the fast-evolving mobile broadband market.

FORBES: FCC Mandates Data Roaming, But They (Still) Don't Know the Territory

Whether the choice of payment is by debit or credit card, gift card, check or mobile phone, online or at the checkout counter, First Data takes every opportunity to go beyond the transaction.

ENGADGET: Google Wallet mobile payment service, Google Offers announced