Interesting, it has "BoboRequestHandler implements SolrRequestHandler" - easy to try it; and shards support
[Fuad Efendi] It seems BOBO-Browse is alternate faceting engine; would be interesting to compare performance with SOLR... Distributed? [Jason Rutherglen] For your fields with many terms you may want to try Bobo http://code.google.com/p/bobo-browse/ which could work well with your case.
