[sho]

"This Rails/Solr adapter is no longer supported, so I'm going to either move to a fully custom solution, or more likely shop around for a better supported Rails plugin. Recommendations are always welcome."

Since you asked, I'd recommend Sphinx, maybe with the Ultrasphinx rails plugin (haven't used it but seems popular). Yeah, it's based on a different engine, but I never liked the hassle of running Java apps anyway.