Microsoft announced, that after "six months of their release, there have been 300,000 downloads of Windows Phone Developer Tools. And, that the full version will be releasing in September 16 to allow developers to finish their apps and test them using emulator to ensure their app will work on Windows Phone 7.
Microsoft also said that final version minor break changes from the Beta tools, so developers may have to fix some bugs that arise. And the highly requested Silverlight control, panorama, pivot, and Bing map controls will be available to drop into apps.
The company has also announced that the app marketplace will start allowing submissions in early October. Windows Phone 7 is thought to be going on sale in Europe in October followed by a November release date for North America.
Microsoft also updated Windows Phone Marketplace policies (pdf) and have said they're hard at work on improving the developer portal following feedback from developers.
Here's an overview of the above talk: