I love "practical" applications of a skill. Church musicians are real people, not some hypothetical conversation piece, and I bet that somewhere, someone needs a cathedral music librarian. It just sounds like a fun job!
Great site for hymns - you can listen online and sing along. Also includes a devotional, hymn story and scriptural references for each one. I would love to have everyone sing a hymn together at the wedding, just voices and piano.
This website has an interactive music player that allows you to view, listen to, transpose, and print the Church hymns and children's songs. There are additional links to help all levels of musical backgrounds.