Stephen Elop, in his financial and strategy briefing continuing Nokia's marathon Capital Markets Day, just posed an interesting rhetorical question: will Nokia be able to "customize everything" on Windows Phone 7 in order to differentiate itself? "Yes!" was Elop's ebullient proclamation, though he quickly pulled it back to say that Nokia likely won't make extensive use of this freedom to tailor Microsoft's OS. Instead, the company will be cautious and seek to maintain compatibility rather than pushing the boat out too far in tweaking the underlying software. That's a major shift for Microsoft, who forbade HTC from skinning Windows