We have secured our vocalist.
The very first time I went to church with Adam, the person up at the front of the church who led the mass had a wonderful voice. I liked it so much that when we got engaged I asked him if it would be weird if we asked this woman (who we don't know) to sing. He got her number from his mother (who works at the church - another benefit of having connections) and gave her a call. She agreed to sing. Now we just need to get together sometime and actually meet her! :)
Organist-wise, Adam called the normal church organist earlier this week and hopefully we'll get together with him soon. His style is a lot like my dad's so I think it should be ok since I have some specific pieces I want played (hello Widor toccata!) I have the music all picked out. It's just a matter of running it by the two musicians and making sure that they have copies of the music.
Things are working out splendidly.