Here's another one I just found! This might look more like what you have in mind.
https://www.backyardchickens.com/t/553727/my-first-coop-a-pallet-coop
Here is a pallet coop that one of the members started on not too long ago. In the pictures you can kinda see what they used to attach the pallets together with. They don't have that many details but it's worth a look.
https://www.backyardchickens.com/t/624175/started-my-pallet-coop
Here's...
I'm curious about this too. My next coop will probably be a pallet coop, but I have no idea how to go about it.
snooptwomey-Please post pictures as you build! I love seeing what people do with pallets!