Time based fragment caching plugin

I've written a plugin to allow for time based fragment caching. It lets you do things like:

<% cache 'fragment_name', 10.minutes.from_now do %>
  <p>something intensive which will be cached for 10 minutes</p>
<% end %>

Also, there's a convenience method so that in your controllers you can do:

when_fragment_expired 'fragment_name', 10.minutes_from_now do
  @stuff = do_something_intensive
end

This will check the fragment cache, see if it's expired and if so it will execute the code in the block. It deals with expiring the fragment itself, so if using this you don't need to have the expiry time in your views and you can keep yourself DRY by having the expiry time in just one place.

Hopefully it's of use to someone.

SVN repo is here:
http://svn.livsey.org/plugins/timed_fragment_cache/

More details on my blog:
http://livsey.org/articles/2006/08/25/timed_fragment_cache-plugin-fragment-caching-with-time-based-expiry

Thanks.

I have recently released a very similar plugin, except mine is designed to work with the robot coop memcache-client (memcache supports time expiry without using meta fragments)
Syntax is similar to Richard's

<% cache 'key', :expire => 10.minutes do %>
  <p>stuff</p>
<% end %>

Blog:
http://skwp.wordpress.com/2006/08/19/rails-fragment-cache-with-memcached-client-and-time-based-expire-option/

Rubyforge:
http://rubyforge.org/projects/mcache-fragment/

Sorry if this was already posted, I don't remember if I wrote to the list or not.

thanks