^ re: the ads. We all know money is tight, especially, sadly, for schools. If the choice is between K3 ads and less books, I say go with the ads. You can always make a new lesson plan explaining basic economic considerations and strategies in the modern age to your kids. They gotta learn sometime, right?

And I understand the K3 ads aren't terribly annoying anyways, at last from some folks I have heard from.
re: where to post. I am new here, but I would think either the Kindle forum or the General Discussion sub-forum would be OK. Kinda leaning towards the Kindle forum myself since that is the HW you will go with. And your observations on how the K3's survive the kids would be of more interest to Kindle owners specifically.
Either is fine IMO.