Been heads down in crunch mode triaging and fixing bugs, getting us ready for CTP6. But, I'm finally almost done with the paper. Hopefully editing/formatting won't take too long and it'll be on the web soon.
FYI in my earlier post I forgot a permission we need. When you add users to a database, under the covers we will create a login on your designdb instance if we have to to get the user created. For that you need to be a member of the "securityadmin" server role member on SQL Server.