I've heard of that device, but I can't find it in the REI catalog.
I can't imagine that it is more convenient than matches filling a
container of equal size and weight, so why bother? It is true that
the air gets hot when it is pumped into a bike tire (and the pump
body becomes uncomfortably warm if one "dynamites" one's tires, as
I often do). The effect could, no doubt, be mechanized to reach
the ignition temperature of thin wood shavings, but where is the
utility in that; in what way would this device be superior to the
aforementioned matches?
While we're on the topic, here's a question for the teachers:
The ambient temperature is 20 degrees Celsius and the pressure is
one atmosphere. A automobile tire is inflated to a guage pressure
of two atmospheres and is in thermal equilibrium with the
surroundings. If the valve core is depressed the tire starts to
deflate. Is the air that escapes from the valve at a temperature
higher than, lower than, or the same as the ambient temperature?
For some reason many teachers seem to think the answer to this
question is obvious. I think that a careful experiment to measure
the exhausting air temperature is in order here.