Here's a simple MouseHole script that modifies the social bookmarking site del.icio.us with a quick link to all posts for any given tag. The script is hosted here until I (or someone else) can find a better place for it.

del.icio.us lINKYlicious
Note this link should work after some DNS changes have propagated.
# Copyright (c) 2005, Rick Moynihan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
#   notice, this list of conditions and the following disclaimer.  
#
# * Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#
# * Neither the name of Rick Moynihan nor the names of 
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


MouseHole.script do
  # declaration
  name "Delicious lINKYlicious"
  namespace "inky.harmonics@gmail.com"
  description "Modifies delicious with links to check tags from all users ."
  # match all del.icio.us pages
  include_match %r{^HTTP://del.icio.us/} 
  version "0.1"
  
  rewrite do |req, res|

    # For each tagged post
    document.each_element("/html/body/ol[1]/li/div[@class='meta']/a") do |el|
      if el.attributes['href'] !~ %r{\?|/url}
        #create a new element and insert it after the current one
        newEl = REXML::Element.new "a"
        #http line modified so I could upload it to this wiki (no external links allowed).
        newEl.attributes['href'] = "http:" + "//del.icio.us/tag/#{el.text}"
        newEl.text = "+"
        el.parent.insert_after(el, newEl)
      end
    end
    
  end
end