Just read the news at msmobiles.com that Nokia should start making Windows Mobile phones for the US market if they want to stay there on "top of the hill".
According to Gartner "In the enterprise market, Nokia should expand its smartphone portfolio past Symbian to include Microsoft-based products. Nokia is in danger of making the same mistake again — trying to force end users to take its preferred solution rather than giving them what they want. In North America, enterprises will demand Microsoft-based products. Nokia should not discontinue Symbian devices, but it should focus Symbian products on the consumer and prosumer market, while offering Microsoft-based products to the enterprise market."
I predict that within two years from now Nokia will make windows mobile phones. That has been my feeling a long time. Go for it Nokia!