iA5 and its more powerful upcoming brother iA100 are on the surface radically simplified versions of earlier iHome alarm clocks: each contains a screen with a clock and an alarm indicator, speaker hardware, and a streamlined collection of buttons to handle volume, power, and clock setting features. Use either with old iPods and it’ll seem more or less like a prior iHome unit, cosmetically redesigned. But plug in the iPhone or iPod touch for…