First of all, I'm glad to be talking to a Freebase engineer :)

Second: It is not intended to be a Freebase killer, but it is certainly better for me and what I needed it for: building denisthebot.com - which can answer questions about a whole lot of subjects while being completely agnostic about what "categories" these subjects fit in.

Third: Since we all know no-one is going to change anyone's mind here, I won't discuss the merits of a DB structured the way I built it. But calling it a toy is quite flattering, I know some very powerful stuff that were called "toy" for some time :) Also, it would be a very easy toy to use, which will suit a lot of people, according to the emails I received.

Also, you're right: "don't throw the baby out with the bathwater".