I've been working on this for a while and it's finally in a state where it's ready for public consumption.
This is a command line indexer that will index CSV or JSON documents: https://github.com/likethecolor/solr-indexer There are quite a few parameters/options that can be set. One thing to note is that it will update individual fields. That is, unlike the Data Import Handler, it does not replace entire documents. Please check it out and let me know what you think. Dan
