Sometimes, like with television or IRC, a channel is actually called a channel. Other times, it's called a site, a publication, a world. Some examples:
Like with TheMedium, I wanted to reify this idea. It's really just a starter; improvement most welcome.
I like it!
Let me describe something I can't figure out how to say outright.
In the OneBigSoup IntComm:Eventsystem (IntCommingDing), I originally used "channels." You sent events to a channel, and others could subscribe to channels.
But then I realized this was more restrictive than I wanted to be. I wanted to just post events, and then let subscribers perform queries over the events, and then receive what they were interested in.
So, for example, someone may request, "Forward me all of Evan's activities." Someone else may request, "Forward me all wiki activities."
Some events fit both queries, some fit one or the other, and some fit one.
So, the concept of the "Channel" I feel is still there- we're picking out an individual stream from TheMedium of the event system.
But I guess you could say that the channel space is N-dimensional, or something.