Is anyone here successfully using microblogs (revou, statusnet, etc) in their backlinking strategy? Are they still useful? I don't see much talk about them here, but I noticed they make up the bulk of one of my competitor's backlinks, with the rest being some higher PR footer links that seem to be from other niche sites they own. It seems like they could/should be on par with a social bookmark link? I was thinking of trying them out to backlink my tier1 sites.