Notification Win 10First preview Build of Windows 10 for Phones went out yesterday and we have done some good coverage which you can check by clicking here. Now, some more tidbits regarding Windows 10 for Phones from official sources.

Transparent Tiles: Joe Belfiore confirms it will be there in future builds. We have seen a leak on Lumia 925 already.

Expect monthly preview Builds form now onwards.

Dark Cortana theme in future Builds.

Shortcut to use feedback on Windows 10 for Phones