An article on "Running the Digital Marathon", specifically all the gadgets that are worn while running. I like what Mr. Solarz says in the article:

“When I see someone wearing headphones in the New York City Marathon, I feel
sorry for them,” Mr. Solarz said. “They don’t even know what they are missing.
The hoots, the hollers, all the bands, the excitement. When else can a skinny
white guy wearing little shorts run in Harlem and get cheers?”

Myself, I'm a minimalist -- just a watch. I do have a heart rate monitor, but I don't use it except for the stopwatch function.