A few notable links and information related to WP7 development:

• Peter desribes how to deal with Orientation changes on the WP7 device.
• The product group has just made available some application bar icons for download.
• Changing on-screen keyboard layout.
• New York Times Silverlight Kit updated for WP7.
• Foursquare for WP7 on Codeplex.

Enjoy :)