most stable way to get facet pivoting

Hi, I want to evaluate (and probably use in production) facet pivoting - what is the best approach to get a "as-stable-as-can-be" version of solr which is able to do facet pivoting? I was hoping to see this in Solr 3.1, but apparently it is only in the dev versions/nightlies... Is it possible to

most stable way to get facet pivoting

Hi, I want to evaluate (and probably use in production) facet pivoting - what is the best approach to get a "as-stable-as-can-be" version of solr which is able to do facet pivoting? I was hoping to see this in Solr 3.1, but apparently it is only in the dev versions/nightlies... Is it possible to