A fold-up keyboard patent was recently published on its inventors' web site to generate interest and potential investors. When unfolded, it's a full-sized 88-key electronic piano that is made up of easily detachable modules. During transport, it will take up about the same amount of space as a two-octave keyboard. You can learn more or apply to join the development group at FoldupKeyboard.

Anyone who plays the guitar knows how irritating it is to ensure the instrument is properly in tune. The Performer is an electric guitar tuner mounted inside the body with an LCD screen to display information (key on a 1200 cent scale, etc.). A push-button interface automatically retunes all six guitar strings to whatever notes are desired within five seconds. In development by TransPerformance for the past 15 years, guitarists Jimmy Page and Steven Perry have used prototype versions on stage. A Performer with installation costs $3400, and no acoustic version is planned.