In his “The Mossberg Solution” column for The Wall Street Journal today, Walt Mossberg reviews a number of accessories available for iPods. He notes that Apple CEO Steve Jobs recently estimated that there may be as many as 200 separate accessories available for the more than three million iPods that have been sold to date. In this report, Mossberg looks at Altec Lansing’s inMotion speaker system, TEN Technology’s naviPod, Belkin’s Media Reader and Digital Camera Link, Griffin Technology’s iTrip mini, Sonnet’s PodFreq, and more.