Paul (@aparcar) and I are working on a revision to a) look like his screen shot above, and b) subsequently include the Firmware Selector at the top of that page.
And there's a really exciting development on the ImageBuilder front. I kind of let the cat out of the bag at: Custom build of OpenWrt with some form of remote access - #3 by richb-hanover-priv (I hope Paul doesn't faint...)