Having used just about every Windows "mobile" platform out there since back in the day it was called Palm PC, through the pocket PC years to the integrated phone units, I'm sad to say I'm one of the many that won't be giving MS another chance after playing with the Win Phone 7. I still have 2 working iPaq's around for a bit of the glory days. On a win phone forum, I'm sure I'll be beat down, and, well, don't care, but sadly I switched to Android and haven't looked back (much).
I don't really see Win Phone 7 getting that much more marketshare than where it's at now. Carriers just aren't pushing it. Where are all the carrier and device manufacture ad's on TV? I see one commercial advertising it about "get your life back" but it doesn't show any features. Carriers and device manu's are advertising the he# out of their android phones. That tells me THEY see where the business and money is.
I hate to see that happen as I spent a ton of $ on just about every previous MS OS device, but I see nothing compelling featurewise today.