[blurry]

Future enhancements to Amazon SNS – such as notification delivery over SMS – will provide more protocol options and additional flexibility to mobile application developers.

Does anyone have an educated guess as to when the SMS transport option will be available? How long does it usually take Amazon to add a promised feature?

[d2viant]

I'd say a couple months at least. If you look at past and present future enhancements listed for their other services (such as RDS replication, Windows reserved pricing, etc.) they've all spent many months in development after the point at which they were mentioned to customers.