Check this out – upload a worship MP3 to this website, wait a few hours and they’ll email back a link with the chords! I tried it with one of the free song downloads here at WorshipIdeas – We Have Risen.
See how chords.fm detected the chords in the song – not a bad job (lowercase letters mean a minor chord, uppercase is major.) The song plays and the chords flow in time to the song.
And this is cool – if the chords aren’t perfect, you can pay to have a human edit the song for $2.99!