We admit it: we have a tin ear. We also admit to having spent some time trying to play guitar and failing miserably, due in part to the aforementioned metallic sensory organ. However, we have new hope, thanks to the String Master Robotic Guitar Tuner. According to the manufacturer, the $50 device can automatically tune your guitar by turning the tuning pegs the appropriate amount as you strum the strings. The device samples the audio as you pluck, and stops turning the peg when the string is tuned. Yeah, we know this thing isn't going to turn us into Jimi Hendrix (or even Johnny Ramone), but at least we'll know that our lousy playing is in tune.
[Thanks, Les — no, not that Les]