Here's a possible early use of RDF to aid Bible study. My Life Application Bible (NIV, Tyndale) has about 100 "personality profiles", brief descriptions of a particular Bible personality. There's a few paragraphs of prose, some bullets on strengths and accomplishments, lessons from their life, vital statistics, and key verses. The prose also incorporates references to other people and places.

It wouldn't take a lot of work to code some of these up in RDF in a way that would link them together through people and places, and tie them back to the verses they're mentioned in, producing a small-scale Semantic Bible Web. Would this be useful? That's the $64k RDF question ...