Symbian is by far the most widely used OS for a mobile phone, if only the majority of user that had a symbian phone realised that their devices are as powerful as an iPhone
“Maemo/Meego is very clearly targeting the same space and market where the Iphone and Andoid solutions are establishing a strong presence. Nokia cannot ignore the US because doing so will allow the competition to get even stronger. For what ever reason, Iphone and Android are ever present here in the US and Nokia is barely visible. I recognize that may be different is other parts of the world, but the key point here is that Iphone and Android are growing stronger without competition right now.