Great writeup. I'm curious, is there a way to find out how much Ellington costs other then contacting them directly? Can't seem to find anything about actually purchasing the source/system on their site.
I forget the exact numbers now, but I called them about it for my college paper and the numbers seemed pretty astronomical (at least, to a college student like myself) for a CMS. I was quoted an amount in the tens of thousands to license the source, and a still-hefty sum to have them host it.