Overall a great talk by @freerobby. One little nit... The Riak search feature is not built on lucene but modeled after it in terms of api. The search itself is not as robust as lucene but useful for most applications.
Thanks for the clarification. I got confirmation on this from Ryan Zezeski as well. Riak-search used to be built on Lucene, but now it's all built by Basho, using Lucene's query syntax.