Elecia (@logicalelegance) and Jen (@r0b0ts0nf1r3) compare multimeters then install the Saleae Logic to debug a problem. Elecia pines for a nifty oscilloscope.
Some products discussed on the show:
Saleae Logic USB Logic Analyzer (and direct Saleae website)
(Somewhat expensive) Fluke Digital Multimeter
TPI 120 Compact Digital Multimeter (El's desk meter)
BK Manual Ranging Tool Kit Digital Multimeter (El's other meter, not Burger King!)
Radio Shack 22-801 (Jen's home meter)
Excellent article on SPI protocol on WIkipedia