During an earlier interview with Sina, Nokia CEO Stephen Elop mentioned that the first Nokia Windows Phone 7 device will be available sometime in Q4 2011.
Besides the estimated availability date, Elop also highlighted how the Nokia devices will have a few differentiating factors in the areas of navigation. This is in line with how Microsoft will tap into Nokia's extensive Ovi Maps service to bolster its existing Bing Maps.
Though Elop did not mention which countries will be the first to see the Nokia Windows Phone 7 devices, it is understood that there will be a gradual rollout across various countries. More details on the availability should be known during Nokia World, which is happening from 20th October.