A blog set up for multiple friends to write on and keep in touch about various life aspects with one another when time/location constraints keep them from doing this in person; a blog that is open to the public but intended to be used as correspondence between a particular set of people.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)