How much longer before this application is embedded in mobile phones.
Visa announced today the availability of the Visa Micro Tag, a new key fob payment device embedded with Visa payWave, Visa's

The Visa Micro Tag allows financial institutions to offer cardholders a companion smart card device to an existing Visa credit, debit or prepaid account. Designed to be small and durable, the Visa Micro Tag makes paying for purchases faster and more convenient.