We've sort of dealt with this subject before, except that in this particularly case, even though before may be chronologically correct in terms of when the note was written, in linear terms it's after because the link that deals with that subject is positioned later in the expository flow of this essay. The subject is, of course, "no before or after in cyberspace", and for rather obvious reasons it has a way of showing up here and there (now and then?) as a sub-theme of numerous topics.

I admit that "postiously" is most definitely not a standard word, but saying "we've sort of dealt with this subject after" is at least as awkward a way of putting things.

Go to: Now that sounds like a rather academic approach, doesn't it?, or
Go to: Web Essays - The evolution of a (personal?) medium