There are a number of reasons for needing to attach an iPad to a tripod. Speakers can use an iPad as a teleprompter, musicians can use one to display sheet music or a set list, or to hold the device when using it as an instrument, and artists may want to hold one up while they work. The iPad can also take decent video in a pinch and a tripod is helpful there too.
This instructable shows how to make a mount for attaching an iPad to a tripod.
This mount is fabricated from extruded angle aluminum, a few wings nuts and washers, polypropylene pipe insulation, and two small buret (burette) clamps. The buret clamps
are available on eBay, from surplus suppliers, or from lab supply houses for about $7-10 each. Any similar adjustable clamps with a mounting stem can be adapted to work. Only basic tools are needed.