Community blogs will always have their place, as hand-selected content remains preferable to lists of automatically generated links. But, 'tagging' — the process of adding keywords to posts — is allowing for the quick distillation of information, grouping thoughts together around shared subject matter. You've no doubt seen the Del.icio.us Chicago tag, and the Flickr Chicago tag, both great Windy City-related resources.

But now, the folks at Technorati have added a tag system to their site, alllowing for the instant search of a particular theme on member blogs. Check out their Chicago page, and you'll notice that it not only aggregates posts with the city as their subject, but conveniently consolidates each of the above services onto one single page. Brilliant.