I just completed porting the cm-x270 Linux kernel patches to the 2.6.22 kernel.  Kernel build is available in OpenEmbedded.  Patches are available in the OE tree:

http://www.openembedded.org/filebrowser/org.openembedded.dev/packages/linux/compulab-pxa270-2.6.22  

Shortly I will be making 2.6.22 the default kernel for the cm-x270 in OpenEmbedded and posting instructions on how to use JFFS2 with the NAND flash on the cm-x270.