Some of the guys at the Hermeneutics site have started workingstarted working on a Bible verse indexer and searcher for Stack Exchange sites, including Judaism. We're primarily focused on making a search script, but it wouldn't be hard to take the data and turn it into a reference->posts index.
https://github.com/alerque/stack-verse-mapper
Here's the current Judaism site index (which will continue to be refined as we develop the software): http://alerque.github.io/stack-verse-mapper/data/judaism-index.json