First thank you to everyone that has posted on this thread regarding the need and importance of offline data support within our mobile product offerings. We are currently in development of these capabilities and fully understand the need to release support for offline use ASAP!!
We also need to make sure we get it right! We need to deliver offline capabilities across multiple platforms with a common API and strategy that is well represented throughout the ArcGIS system (Mobile, Desktop, Server, Cloud). Doing it right means that you can move data seamlessly between your enterprise database and field devices without the need to move transform into other data formats when moving between platforms. That is what we are working on now.
We will announce updates to our schedule and release of cross-platform offline capabilities (with details on what will/will not be supported) at our upcoming Developer Summit (http://www.esri.com/events/devsummit/index.html) during the week of March 25th. Thank you for your patience.