Today, Nokia stands at a fascinating fork in the road. Let's consider the facts: first, and most unavoidably, the company is the largest manufacturer of cellphones in the world by a truly sobering margin. At every end of the spectrum, in every market segment, Nokia is successfully pushing phones -- from the highest of the high-end (see Vertu) to the lowest of the low (the ubiquitous 1100 series, which as far as we can tell, remains the best selling phone in history). The kind of stark dominance Nokia has built over its competition certainly isn't toppled overnight, but what might be the company's biggest asset has turned out to be it