In my ongoing quest to collect all things Arneson, I just got my hands on the Shadowrun Adventure DNA/DOA. I have yet to read through the module, but I instantly came across the chapter called "At the CBI", detailing a social establishment called the "Corporate Bums and Indigents Club", informally known as the CBI.

Will keep you posted in more Blackmoor references should I come across them! :)

-Havard