Windows Phone Developer Tools October 2010 Update is out. Rough overview of features and download link are below. Recommend everyone pull this. Sizewise its only about 2 meg, an easy download.

What’s in the October 2010 Update
  • Windows Phone Capability Detection Tool – Detects the phone capabilities used by your application. When you submit your application to Windows Phone Marketplace , Microsoft performs a code analysis to detect the phone capabilities required by your application and then replaces the list of capabilities in the application manifest with the result of this detection process. This tool performs the same detection process and allows you to test your application using the same list of phone capabilities generated during the certification process. For more information, see How to: Use the Capability Detection Tool
  • Windows Phone Connect Tool – Allows you to connect your phone to a PC when Zune® software is not running and debug applications that use media APIs. For more information, see How to: Use the Connect Tool.
  • Updated Bing Maps Silverlight Control – Includes improvements to gesture performance when using Bing™ Maps Silverlight® Control

Download link - http://www.microsoft.com/downloads/en/details.aspx?FamilyID=49b9d0c5-6597-4313-912a-f0cca9c7d277