THE COOLEST IPOD ACCESSORY I’VE SEEN so far: A whole-house FM transmitter. I would have loved one of these as a kid, especially as it works with everything, not just iPods.

UPDATE: Reader Jim Stanton notes that this one comes with hacking instructions in the reviews. Helpful!

And many, many readers recommend the Apple Airport Extreme with AirTunes, but that’s a lot more expensive, and lacks the cool Mad Scientists’ Club angle. Of course, for that, you really need one of these, which Ernest Miller (natch) reports he’s built.