This is a little reminder of things i think should be better to be upadated soon in OE 1.6.

1) E2 patch fix-dvdburn-pathes.patch (fix or remove)
2) kernel modules for openvpn and smargo support
3) busybox config.

About 1 i think you already know
About 2: i think tun module is better to be enabled because it is needed by openvpn (dependency) and i think it is nice to have available in image the usb serial major modules and other relevant modules.
So in openembedded/conf/machine/dmXXX.conf i think should be added:

kernel-module-nls-iso8859-15 \
kernel-module-usbserial \
kernel-module-ftdi-sio \
kernel-module-pl2303 \
kernel-module-cp2101 \
kernel-module-ntfs \

In openembedded/recipes/linux/linux-dmXXXX-2.6.18/defconfig it should be changed:

CONFIG_TUN=m

CONFIG_USB_SERIAL_PL2303=m

About 3 it seems that in busybox something useful is missing i think it should be enabled at least crond crontab and other minor features like dc and tar old compatibility:
In openembedded/recipes/busybox/busybox-1.15.3/opendreambox/defconfig it should be changed:

CONFIG_FEATURE_TAR_OLDGNU_COMPATIBILITY=y

CONFIG_CROND=y

CONFIG_CRONTAB=y

CONFIG_DC=y

And finally please remember to check hddtemp no more working.

Thanks in advance.