Following on from Strategy Analytics and Tomi's stats for smartphone sales in the whole of 2009, summarised here by me last week, we now have confirmation, courtesy of the USA-based IDC, of the very latest Q4 2009 smartphone world unit sales: again, Nokia lead the market with 38% for its S60-based smartphones, while RIM's Blackberrys are in second place with 20%. Q1 2010 results will be even more interesting, expect these in the first week of April.