The BlogLog tool shows the community of readers around a blog and connects the readers to one another. With the BlogLog, readers can sign up to be part of that particular blog’s community, share their photo, background information, and links with other readers.

BlogLog communities are essentially social capital on display. They extend solitary posts and ad-hoc comments into networking opportunities. Readers can see who else is or has been visiting that Web area, venture into like-minded readers’ blogs and leave them comments.

According to Techcrunch today, the MyBlogLog widget will now allow its users to label their blogs and communities with tags (i.e., labels). Here is an example of a blogger who is already a member of 67 communities and has close to 3,000 friends through BlogLog. His tags will trickle in as his extended online community labels and classifies his content.

What does this mean for PR professionals? With BlogLog tags, we can get a quick review of the bloggers’ and its readers’ focus areas. We can also get a qualitative sense of the blogger’s reach and navigate through his social map to reach other influencers, aficionados, ambassadors and spectators. Tags are the footprints of decentralized, social media.