Price: $2,500
Jamming with tech moguls like Roger McNamee -- the co-founder of Silicon Valley's Elevation Partners who also performs with the semi-pro band Moonalice -- requires more than talent. It demands the Les Paul Robot Guitar, a high-tech guitar with an automatic tuning button.
The limited edition robot guitar eliminates the hassle of lowering the pitch of every string by hand, and then strumming and tweaking. Produced by Gibson Guitar, the instrument arrives programmed with several popular open tunings such as Open G and Open D, as well as tunings for six classic hits including Led Zeppelin's "Going to California" and "Voodoo Child" by Jimi Hendrix. It can also be programmed with customized tunings.
So even if you won't be opening for Etta James with McNamee at San Francisco's famed Fillmore, you'll be pitch perfect.
More information:
www.gibson.com/robotguitar/guitar.html 
