A nice joke in Engadget today:
Q: How many Microsoft engineers does it take to change a lightbulb?
A: None, they just define darkness as an industry standard.
They also offered the slightly lamer:
Q: How many Apple engineers does it take to change a lightbulb?
A: 13, 1 to do the screwing and a dozen lawyer-types to prepare for the recall.
Hey, there's something missing from the above, so I hereby offer:
Q: How many Linux developers does it take to change a lightbulb?
A: Just one. Three weeks later, he comes back and screws in Lightbulb 2.0, which casts thirty percent more light but flickers on and off every two seconds. Two weeks later you get Lightbulb 2.1a, which works beautifully for five months and then explodes without warning, slightly injuring your cat. After a quick emergency callout your friendly Linux engineer screws in Lightbulb 3.0, which casts nearly as much light as Lightbulb 2.0, plays the latest hipster tunes, and reports your Light Status to the Web 2.0 LightR service, but uses seventy three thousand watts of electricity and takes thirty seconds to turn on.
A while later you receive the long-awaited Lightbulb2 1.0, which turns out to be perfect in almost all respects, but is green.