At a recent Hippo meetup I gave a presentation about enterprise search. Being able to index and search your content, both in the Hippo CMS and in other sources, is of interest to many Hippo users. The presentation does not go into any Hippo specifics, but provides a brief introduction to search, Apache Lucene and concepts like an inverted index, but quickly goes into the two main enterprise (open source) search servers: Apache Solr and Elasticsearch.

Check out my slides for this talk on SlideShare:
http://www.slideshare.net/lucacavanna/hippo-searchmeetup