Wow. Part of me wants this to suck, just so there are only iPhone and Android to worry about ever developing for, but this actually looks good enough to consider. I looked at WP through BizSpark a little, and it looks easier to develop for than iOS or Android, at least for corporate apps. It's possible RIM will lose out in the "corporate owned/managed" market to WP, especially if they can build in equivalent or bette…
Owning the device is a pain, though.
1) Lack of apps. No Pandora. No Bump. No Uber. That trendy new mobile startup? Nope. I sincerely believe that nobody in any YC startup doing mobile even _has_ a Windows VM, except on the test team.
2) Quality of the non-Live experience. It's easy to hook up your gmail account, but then every time you add a contact, it nags you about which to add it to. Plus, when I was just using Live mail (experiment), I'd get ~20 hours of battery life out and about; with gmail, I get max 5. I'm not sure what's going on there, but 5 is not quite enough.
Still, there's always hope. But I'd more heavily consider developing for it than using it as your One True Device.