Anyone who thinks reddit had anything to do with "microblogging" clearly doesn't understand what Reddit was. Hell, most of the good subs aren't even aggregation, but original content.
context for microblogging: kbin is a software running karab.in. It's a polish community, modelled after wykop, which includes microblogging functionality, so then does kbin. Wykop in turn was made after digg, the names mean same thing.