The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Fuzzywhite Technology:
The Official mobile application for Godspeed Rock OperaHear the word of God come to life in a new rock opera based on the gospel accounts of Jesus Christ. The upcoming production will be presented as a concert hybrid of musical theatre and multi-media, bringing key characters of the New Testament to the stage. With every lyric derived directly from scripture, this will be the worlds first live event presenting the life and times of Jesus of Nazareth told in Gospel accuracy.The producers of Godspeed are in the process of staging the world premiere in Los Angeles around Easter of 2011. Be part of the team by visiting http://godspeedrockopera.com to download a free song and spread the word!