In his latest “Personal Technology” column for the Wall Street Journal, Walt Mossberg gives very high praise to Apple’s new iMac G5. “I am writing these words on the most elegant desktop computer I’ve ever used, a computer that is not only uncommonly beautiful but fast and powerful, virus-free and surprisingly affordable,” writes Mossberg. About the only thing negative Mossberg has to say is that Apple “scrimped on memory — even the top model of the new iMac has just 256 megabytes,” and the company decided not to include a built-in reader for memory cards used in digital cameras, PDAs and smart phones.