Yep. Anything with either a miniplug (headphone) or RCA out will work. You won't get the cool features like controlling your iPod from your stereo controls, but the X aint no Benz. Everything you need, nothing you don't, right? I can even play MP3's from my PocketPC through my stereo. This doohickey needs two inputs: audio, and a power source to dupe your head unit into thinking there's a CD changer jacked into it.
Sure it costs (a lot) more than a modulator, but it doesn't suck.
Yeah I sound like I'm queer for it, but I SWEAR I don't work for virtualo.