Hi All,
As part of the 11.09 cycle I've completed an extension to live-build3 that add linaro-media-create. This means with this branch of linaro's live-build 3 one is able to build your custom image and directly output it to either your SD media or to a file which you an dd directly to the media of your choice.
The extension lives in a bzr branch at lp:~tom-gall/live-build/integrate-linaro-media-create
This code should be considered beta quality. There are bugs. The code is however useful. It will be especially useful when combined with the cross build support for live-build that was announced as part of the 11.07 cycle.
I've updated my HOWTO which can be found here:
https://wiki.linaro.org/LiveHelper/Hacking
If you run into issues please either file a bug in launchpad https://bugs.launchpad.net/linaro-ubuntu , post to the list, or grab me on irc. (tgall_foo or Dr_Who)