The OData client library as well as its source are available for download from the codeplex. The download also includes the sample app utlilizing the Northwind database.
The full version of the book: Programming Windows Phone 7, by Charles Petzold is available for download.
The Sync Framework 4.0 (they jumped over the v3) October CTP is available for download. This framework is built on a top a standard protocol – OData and implements an “assymetric” syncing – meaning that most of the synchronization logic will be running on the service side. The release includes server and client components that…
Kevin, from Clarity has started a blog post series on the tips when developing WP7 applications. Hist first post dives into the nitty gritty details on how to improve performance of your applications. Must read!.