As do some others, I have mixed feelings about the underlying utility and even about the notion of multiple channels -- but there do seem to be points both pro and con.

Nonetheless, FWIW (if anything): it would be possible to create a version of one or another of the many Other CB Clients with a multi-channel inerface.

I can imagine, for example, a variant of Fullpage chat with multiple pairs of talk/read boxes, which might answer the "balkanization" concern to some degree