Few more KB articles have been posted on the support site and they're mostly related to the Distributed Exchange (fees, how it works, what Counterwallet options impact its workings from the user perspective, etc.).
They may be a good reading for those who have had issues trading on the DEx or finding information about how the DEx works.
Example:
http://support.counterparty.io/support/solutions/articles/5000051508-what-do-various-expiration-limits-in-counterwallet-advanced-options
Recent and older KB articles are available and searchable from here:
http://support.counterparty.io/support/solutions