A browser extension/toolbar that mimicks Furl. Or cooperates with furl. Anything you post to Flickr should be added. Anything you post to your blog should be added. Anything you see in your newsreader should be added with one click. Any public resource added to your database should take advantage of collaborative tagging. Click one: Here are the top 20 tags other people have used. Click two: Added with every tag that has more than foo% agreement. Add other popular tags with one click each or enter your own.