Not exactly groundbreaking gear, but I picked up one of these today.
And like it a bunch. Tuner/Metronome, tempo tap feature that'll let you tap along to a song and give you a rough tempo, as well as a slick audible metronome that has two tones for each side of the pendulum swing.
Well worth $20. The only thing I wish it had was a passthrough - it only has an in and a headphone jack.