Geek Update
(or)
As AC/DC Said: Let There Be Rock

After spending forty-eight bucks on a tiny but awesome FM transmitter and another forty-three bucks on adapters to get said AAA battery-powered transmitter to plug into an AC outlet, I'm finally playing tunes from my iMac into my stereo and boombox on any damn available FM frequency I choose battery-free! (Above prices are inflated due to gotta-have-it-now shipping costs.)

The transmitter

The transmitter to DC adapter

The DC to AC adapter

Now all I need is some Macintosh freak to email me and say: "Hey, you could have bought (this yet-unrealized-for-me product) that does all of the above for only twenty-five bucks!"