Maybe this could be stickied somewhere else, but the platforms growth largely depends on user forums, because let's face it, we all read these things and probably put more stock in them than reviews when considering new devices.
Windowsphonemedia.com has a forum that has sort of died down lately. But it would be cool to see it get busier.
It's basically a place where some of the old Backstage people went. We were all on the Windows Backstage forums months before Windows Phone launched. But once it launched, it wasn't really a "backstage" thing anymore. So Microsoft made a little farewell video and closed the Backstage forums. So we all looked for somewhere to go.
Though I imagine many of them are actually here on WPCentral now.
So to any Backstagers... I was "Winning Guy" there. Give me a shout!