An interesting poll I found on Slashdot: How many microprocessors are in your home, total?

For simplicity's sake, I'd say don't count cores of a CPU, as theoretically they're part of the same circuit. Instead, if an electrical device has a microprocessor, count it as one, if you have two of the same device, count it as two.

For just my "computing" devices, I have my Macbook (1), Mac Mini (1), Thinkpad (1), my sister's laptop (1), my Xeon server (1), the old idkfa server (1), the old gaming rig (1), the PS3 (1), the Xbox (1), wireless routers (2), WiMax modem (1), Arduino controllers (2), and audio/video receivers (2).

One of the comments had this list, probably a good start:

• Cell phone(s): 2
• Wireless phone: 0
• Answering machine: 0
• Microwave oven: 1
• DVD player: 0
• CD player: 0
• MP3 player: 2
• Digital clock radio: 1
• Electronically controlled stove: 0
• Dishwasher: 1
• Digital Thermometer: 1
• Bread machine: 0
• Wrist watch: 1
• GPS: 0
• TV(s) / LCD(s) / CRT(s): 2
• Cable box or satellite dish: 0
• Calculator(s): 1
• Digital camera(s): 2
• Camcorders: 1
• Programmable thermostat: 0
• Water heater / boiler: 1

So, at least 32 for me. Then I thought about some other peripherals...

• Game controllers: 6
• Mice: 3
• Keyboards: 3

Up to 44.