Depending on the nature of the canned air, I would be against its use as there CFCs used in the can. While the exact nature of the CFC might not be on an environmental list, it is nonetheless linked to problems in our environment. As our company cleans out 5 to 10 computer per day, this would be a lot of cans going to the garbage and many hundreds of litres of gas - typically CFCs. I much rather use a compressor for this purpose, but the article mentions that there could be water in that stream of air. Quite correctly, the author does say that this is a very small and remote chance of spraying water, the solution is rather simple. Near the bottom of the tank is a valve that is used to blow out any water buildup. At room temperatures, the amount of water vapour that can be generated in a 100 PSI pressures is exceptionally remote.
This is a much larger compressor, and one that I will need to move up to - only because of the shear volume of computers we clean while we do our annual maintenance for our clients. We also use the compressor for other reasons. Canadian Tire often has smaller 2 gallon units on sale for about $ 50. The are excellent products to have, but again, there needs to be some maintenance on them - pressurize them mildly, and open the valve to push out any water that has accumulated.
People look to Geeks for information, and I think that this is a better option than the canned air - for economic and ecological reasons.