There's no veil of secrecy covering this one, but Western Digital has finally come clean with the industry's first 2TB internal hard drive. Launched today in the USA, the planet's highest capacity single HDD -- otherwise known as the 2TB Caviar Green ($299; available now) -- sits on a 3.5-inch platform, includes 32MB of cache and is based around WD's 500GB per platter technology (with 400Gb/in2 areal density). Hot