From wordpress to flickr to del.icio.us and connotea, tagging appears to have caught on, not to mention labels in GMail. It’s not a ground breaking innovation, but a very ‘google-ish’ intelligent extension to an exisiting domain. Online bookmarking does seem interesting in that it’s great to share bookmarks. This is particularly useful in research, as you could see in connotea, an initiative of the Nature Publishing Group (NPG). It’s easy to surf users with similar tags, find related papers to the ones you are concerned with and so on.
I guess tagging is here to stay, just as I tag this post with it’s categories, being Technology and Software and Computers.