BerkeleyX: EE40LX Electronic Interfaces Module 1

I just started the Berkley edX course on Electronic Interfaces.  The ultimate goal is to build a small robot and they give you latitude along the way on how to build it.  At the end of Module 1 (just before the quiz) you put together a voltage regulator to power the MSP430G2 from a battery.  Here is mine, running the hello world sketch:

Their design calls for a 9V battery and a LM1086 3.3V voltage regulator.  I'm using a LD1117AV33 and a 4xAA switched battery pack because that is what I happen to have on hand.  I made 100 on the quiz.  So far, so good...