Each week Ross Rubin contributes Switched On, a column about consumer technology. In describing Toshiba's decision to exit the U.S. netbook market, Engadget eulogized that it was "a sad day for those who like their computers tiny." Toshiba, a pioneer in the ultraportable market with the Libretto and Portege, produced what were among the best-regarded netbooks despite entering the market late. Indeed, even with the many aspersions cast upon netbooks by one-time frien