Plugin similar to Taxonomy Drill-Down for custom fields?

Is there a plugin available that does for custom fields what Scribu’s excellent Taxonomy Drill-Down (formerly called Query Multiple Taxonomies) does for taxonomies?

I used to have a plugin that did exactly this. It was called Custom Field Taxonomies. Then custom taxonomies happened:

http://scribu.net/wordpress/custom-field-taxonomies/change-of-direction.html

That said:

http://wordpress.org/extend/plugins/query-custom-fields/

Let me know if you would like to adopt it.