http://del.icio.us/tag/ shows a alphabetic list of tags , sized by popularity (like the http://www.technorati.com/tag/ layout ).
and http://del.icio.us/new/username/ does a similar thing for your tags (or my tags)and uses green for related tags (plus red for tag intersection). Very slick Joshua.
see also: Jeffery Veen >Size Matters: Rendering a Folksonomy
Category:del.icio.us