What's in Windows Phone 7 for Developers

I've been reading with interest all the Windows Phone 7 news thats relevant for developers. I'll keep jotting down summaries here as I find them -

Though Windows Phone 7 supports multi-tasking...developers won't have access to it in the initial release.
Native applications are not permitted on Windows Phone 7 devices.
Developer access to Microsoft SQL Server Compact, a free SQL Server embedded database, is not part of the initial release..."isolated" local storage based on XML files and cloud-based storage are alternatives
Windows Marketplace is intended to be the sole means of finding and downloading phone applications
..fast and open process for certifying Windows Phone applications and deploying them to Windows Phone Marketplace
With features like push notification service, WP7 is carefully engineered to minimize battery use (Source: ComputerWorld)

Windows Phone 7 mobile OS will not include a clipboard capability for copy-and-paste operations - at least not in the first version. (Source: ComputerWorld)

The Windows Phone 7 Series supports programs written for either Silverlight or XNA but mixing them up & combining Silverlight & XNA in the same program is not possible for now.
WP7 Series OS exposes classes defined by the .NET Compact Framework
At the present time, C# is the only supported programming language
Windows Phone 7 is "cloud-ready"
A Windows Phone 7 can only two possible screen sizes - 480 X 800 or 320 X 480 pixels
For better power efficiency, Windows Phone 7 displays will likely use OLED ("organix light emitting diode"). Designing screens with black backgrounds can conserve power.
The screens incorporate capacitance-touch technology, which means they respond to a human fingertip but not to a stylus or other forms of pressure. Windows Phone screens are required to respond to at least four simultaneous touch-points.
WP7 supports both speech synthesis & speech recognition through classes that are also part of .NET 4.0 (Source: “Programming Windows Phone 7 Series” book by Charles Petzold - 6 Preview chapters available for free download)

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