CAUTIONARY NOTE!!!!
I applied these modules to my pogoplug pro and it failed to boot up to a state where i could SSH to it!! I spent some time re-installing over and over and the problem seems to be with one of the drivers. Might take me sometime to work out which one(s) are failing, so for now beware

Just for reference:
I re-formatted my usb stick, mounted it and extracted ArchLinuxARM-oxnas-2011.06.tar.gz on to the drive. Added hostname and static IP to /etc/rc.conf, updated /etc/hosts and added the /usr/local/mac_addr. Unmounted and ran fsck on it. Put stick in to pogoplug and powered on. Everything works fine and i can SSH in. Now I then extract oxnas-kernel-modules.tar.gz to / and run depmod -a. Box still work until I restart, when it just doesn't respond.
I spent a bit of time looking to where the boot is failing and from what I can see it on /etc/rc.sysint. It processes:
/bin/findmnt / --options ro &>/dev/null || \However fails to pass the next line of code
status "Mounting Root Read-Only" /bin/mount -n -o remount,ro /Both the above packages are from
http://archlinuxarm.org/os/index.php?d=oxnas/######## additional notes ##########
I have worked my way through the modules in oxnas.kernel.modules.tar.gz and have installed them all with the exception of the below. If you exclude the 3 below the system boots as expected
/lib/modules/2.6.31.6_SMP_820/kernel/drivers/net/mii.ko
/lib/modules/2.6.31.6_SMP_820/kernel/drivers/net/gmac/gmac.ko
/lib/modules/2.6.31.6_SMP_820/kernel/drivers/scsi/scsi_wait_scan.ko
The orignial files (ArchLinuxARM-oxnas-2011.06.tar.gz) are .gz'd, however in the oxnas.kernel.modules.tar.gz there are not .gz'd.
So as a test I gunziped the orginals and didnt run "depmod -a" and guess what the system failed to booted ok.
Also I have only just noticed hwclock doesnt work either.
Will take another look in the week to see if i can work out what going on