+- changing the memory part from the SOIJ8 to the DFN8 would save about 2mm
+ in width, but that doesn't really help.
+- changing the 5V switcher from S8 to MS8 takes us from 5 tall to 3 tall, but
+ costs $0.30 more per piece and isn't stocked by Digikey. Not worth it?
+
+- noticed the NXP SC18IS600, which is an SPI slave to I2C master interface
+ with a few GPIO lines... mate that with an HMC5843, which is a 3-axis
+ magnetic sensor, and we might have another interesting companion board for TM
+
+