Interactive Church Music Player

I know some of y'all are musicians, so I thought I'd share with you an interesting Web-based application for exploring church music. I originally heard about it from a MetaFilter discussion. It's called the "Interactive Church Music Player," and it's from the Tabernacle people at the LDS Church. It "not only shows the sheet music, but allows transposition, tempo changes, part selection," and other cool stuff. If you have Flash, check it out.