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 Ditty Labs:
Cheer on your team by waving their colors from the stands. Join others to create a unified color wave throughout the arena.Arena Wave contains the colors of over 375 basketball teams across the United States.The colors of your local basketball team are found automatically. Simply tell Arena Wave to use your location and choose the team colors from those matching your current venue. If you aren't currently in your local arena, you can also use your zip code to find your local team colors.Once you've selected your colors, just tilt your iPhone left and right to switch between them and cheer on your team!
Now presents multiple local colors near the specified location.The maximum local colors found can be adjusted in the application settings.In addition to using your current location, you can now use a zip code to find local colors.Added five new local colors.Fixed bug where application would not present colors after running another OpenGL application.