You don't have to know someone at Apple to get this fixed. At least I didn't. In fact, all I had to do was ask.
I too had noticed my iBook (dual USB, circa Sept 2002) stinking like armpits, cumin, or my plastic lawn furniture that's been in the sun for a while (why do those disparate things smell the same, I wonder?). I has loathe to sit in a crowded plane with this thing giving off an odor that'd surely be blamed on me. I was distraught thinking I'd have to live with it.
I first called Apple and they told me to let it run for 72 hours with the top open and see if the smell went away. If that didn't work (which it in fact didn't, they instructed me to take it into my local Apple Store. Which I did.
I took it to the Clarendon VA Apple Store. The Genius Desk took a look and smell at it. He proclaimed himself "worried" about the keyboard (something electrical or plastic breaking down I gathered) and immediately informed me he'd order me a new keyboard and install it when it arrived...No charge thanks to the SOVERYWORTHIT Apple Care warranty.
Don't give up hope fellow stinkers! Maybe I got lucky but it looks to me like all you have to do is ask. Might be harder over the phone than if you have a Genius Bar to stink up in person, but I don't know.