OpenWRT Backfire 10.03.1 was recently released on 12/21/2011. If you need to install additional packages, the UI interfaces is very slow and unresponsive at times. You can get around this by installing packages from the command line. Here is an example showing how to install "wol." Of course, you will want to be sure you are pointing to the correct package repository for your device.
root@openwrt:/bin# opkg install http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/packages/wol_0.7.1-2_brcm47xx.ipk