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 Pink Twins:
Use your iPhone/iPod/iPad with Max/MSP or Pure Data!Fantastick turns your device to a custom multitouch controller. Send multitouch data to the host program and receive drawing commands.Instead of a limited set of builtin-widgets, the interface logic resides in Max/MSP and only drawing commands are sent to the device. Build interfaces that ..- work and look exactly the way you want- change dynamically to fit the musical context- are experimental and would not be possible with other appsWatch this intro:http://www.youtube.com/watch?v=WWYF9pB2nzcFeatures- Minimalistic, fullscreen control area with nothing on it but what you provide.- Multitouch-events on the device are forwarded to your host via UDP. Information includes the touch state (begin, move, end) and coordinates for all touch points.- Designed for no-hassle: zero-click startup, the device does not sleep or suspend network connection, flicker- and lag-free. - Displaying images (fetched with URLs) and caching them on the device for use on non-networked locations.- Basic drawing with lines, boxes and text.- Advanced drawing with OpenGL.Visit http://pinktwins.com/fantastick for quick start and usage examples.NOTE: this app works together with other software. When launched you get a black screen, what happens then is up to you. Visit the website for examples and documentation.