I thought the image used by Eli Parser was easy to visualise. See: http://arnoskatas.files.wordpress.com/2011/05/beware-online-filter-bubbles.jpg http://arnosk

I thought the image used by Eli Parser was easy to visualise. See: http://arnoskatas.files.wordpress.com/2011/05/beware-online-filter-bubbles.jpg http://arnoskatas.files.wordpress.com/2011/05/beware-online-...