Blogs? Hmmm.
Blog software is a fairly recent development. Many, many years ago, software and particularly game developers use to keep online weblogs of things they were working on. Blues News was THE major gaming site of the day (like 96, 97 or so) and you could find pretty much all the ID game guys and whatnot posting weblogs and keeping the gaming community up to date on what was going on.
Pretty good history on wikipedia
http://en.wikipedia.org/wiki/Blog - not entirely correct, but nothing is ever entirely correct there I guess.