Sorry for letting the ball drop on the follow-up on this one. Overall I'm quite happy with the results of Dr. Colorchip. It's not going to fill in a chip that deep perfectly (it went past the primer all the way down the the aluminum), but color-wise, it's a match and you really have to look for the spot in order to see it now. If you don't know it's there, chances are you won't notice it.
So to recap, here's what it looked like in the beginning:
And here's what it looks like now:
And keep in mind that the chip actually looks more noticeable in these pics than normal because of the flash. Under normal light, it's barely noticeable.