I am using git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git for-next branch to get familiar with device tree.

I am following procedure described in following thread --

http://lists.ozlabs.org/pipermail/devicetree-discuss/2012-April/014600.html

Turn on CONFIG_ARM_APPENDED_DTB,  CONFIG_ARM_ARAG_DTB, then appending imx28-evk.dtb and constructing zImage_dtb
 
However this image never initializes network interfaces, I can't mount nfs as rootfs. Is the appended DTB supposed to work from above referenced git repo & branch?

Is there a device-tree newbies mailing list by any chance?

-Subodh