Yes finally we can start using the Flex SDK to build mobile AIR apps. Yes Flash has been on the mobile for quite a while however the many Flex dev's out there have been waiting to use the SDK for mobile. The latest version of Flash Builder "Burrito" has now been released on Adobe Labs it's currently a preview version as not everything has been completed yet. Details on Labs about mobile Flex development. Mobile development with Hero & Burrito.

Here are a couple of intro videos covering a basic app from build to deploy on an Android device.

Beginning A Mobile Flex Application

Part 2 Navigation & Lists

Part 3 Debug & package app for device

Currently this is only available for Android due to the packager that creates an APK file however more will be added before final release. Checkout the sample apps (Android) on your device including a Tour de Mobile Flex app! So what have you got to loose get started on mobile Flex development. UPDATE: I'll be adding more links in here to tutorials on how you can get started in Mobile Flex development. First up session slides & code from hands on lab at Adobe Max 2010.