Yeah it looks interesting. I recently spent time looking into a search solution for the project I'm working on. I must look at Sphinx in more detail now.
I mainly looked at ElasticSearch
and Apache Solr
. They're both based on Lucene
. Both have RESTful APIs and lots of native implementations. The both offer all core search bells and whistles.
ElasticSearch is designed to be a highly configurable distributed network with lots of replication/duplication. The documentation isn't the greatest though.
Solr doesn't scale as well. It's got a bigger community and better documentation.
From an initial look Sphinx seems to have a good mix of their best qualities.