"next few months" announcement from the unveiling of the Nokia Lumia 900 leave you wanting? Perhaps a March 18th pronouncement will sate your own personal gadget knowledgebase. That's the date being tossed around by Windows gurus Paul Thurrott and Mary Jo Foley, who joined forces on TWiT to discuss the presence of a March date in the latest Nokia developer newsletter. But that wasn't good enough for Paul, who said the specific date is March 18. Go ahead and mark your calendars, but we'd recommend you use pencil -- just to be safe.