Looks like someone figured this out already, but the information isn't on here. Thanks to
http://blog.bofh.it/debian/id_265apt-get uboot-mkimage
cd /boot/
mkimage -A arm -O linux -T kernel -C none -a 0x00008000 -e 0x00008000 \
-n Linux-<kernel Version> -d vmlinuz-<Kernel Version>-kirkwood uImage
mkimage -A arm -O linux -T ramdisk -C gzip -a 0x00000000 -e 0x00000000 \
-n initramfs -d initrd.img-<Kernel Version> -kirkwood uInitrd