Quick and dirty Gmail filters. Work ported from procmail a couple of months ago... Write out an xml file `erb filters.xml.erb > filters.xml` and import this into gmail Settings->Filters tab ("import filters" down at the bottom of the page).

filters.xml.erb

<?xml version='1.0' encoding='UTF-8'?>
<feed xmlns='http://www.w3.org/2005/Atom' xmlns:apps='http://schemas.google.com/apps/2006'>
  <title>Mail Filters</title>

<% MAILING_LISTS = [
  {
    :name => "canonical-com",
    :pattern => :list,
    :base_name => "lists.canonical.com",
    :lists => [
      "canonical-allhands",
      "canonical-announce",
      #...
    ]
  },
  {
    :name => "ubuntu-com",
    :pattern => :list,
    :base_name => "lists.ubuntu.com",
    :lists => [
      "juju",
      "juju-dev",
      "ubuntu-announce",
      #...
    ]
  },
  {
    :name => "launchpad-net",
    :pattern => :list,
    :base_name => "lists.launchpad.net",
    :lists => [
      "blueprint",
      "buildd",
      #...
    ]
  },
  {
    :name => "launchpad-bugs",
    :pattern => :bugs,
    :lists => [
      "Admin",
      "Assignee",
      #...
    ]
  },
  {
    :name => "wikimedia-org",
    :pattern => :list,
    :base_name => "lists.wikimedia.org",
    :lists => [
      "labs-l",
      "mediawiki-api-announce",
      "wikitech-l",
      #...
    ]
  },
  {
    :name => "org",
    :pattern => :list,
    :base_name => "org",
    :lists => [
      "austinonrails-austinonrails",
      #...
    ]
  },
  {
    :name => "rubyforge-org",
    :pattern => :list,
    :base_name => "rubyforge.org",
    :lists => [
      "bdrg-members",
      #...
    ]
  },
  {
    :name => "ruby-lang-org",
    :pattern => :list,
    :base_name => "ruby-lang.org",
    :lists => [
      "ruby-talk",
      #...
    ]
  },
  {
    :name => "googlegroups-com",
    :pattern => :list,
    :base_name => "googlegroups.com",
    :lists => [
      "pecancommons",
      "techranchers",
      #...
    ]
  },
] %>

<% MAILING_LISTS.each do |list_group| %>
  <% list_group[:lists].each do |list| %>
    <% group_name = list_group[:name] %>
    <entry>
      <category term='filter'></category>
      <title>Mail Filter</title>
      <content></content>
      <% case list_group[:pattern]
         when :list %>
       <apps:property name='hasTheWord' value='list:&quot;<%= list %>.<%= list_group[:base_name] %>&quot;'/>
      <% else %>
        <apps:property name='hasTheWord' value='Launchpad AND replyto:(@code.launchpad.net) OR replyto:(@bugs.launchpad.net) <%= list %>'/>
      <% end %>
      <apps:property name='label' value='<%= "#{group_name}/#{list}" %>'/>
      <apps:property name='shouldArchive' value='true'/>
      <apps:property name='shouldNeverSpam' value='true'/>
    </entry>
  <% end %>
<% end %>

</feed>