Aha! It does turn green!
In regards to my power adapter saga...
Well, well, well...
I'm working along, sucking down binaries from Usenet, listening to a Dennis Miller rant MP3, and I see the battery status indicator in my menubar change from a time-remaining-to-charge to "Calculating...". And then, I saw the glow ring on my charger change from bright yellow to a dimmer yellow-green. Aha!