Microsoft unveiled a new developer website, called "App Hub," a single place where Windows Phone and Xbox LIVE Indie Games developers can register; find development tools, support and resources; and submit and manage their apps for Windows Phone and Xbox LIVE. Every Windows Phone 7 customer will get all of their apps and games from the Marketplace Hub on their phone and from desktop Zune software.
The biggest change with App Hub is that with one single $99 USD annual subscription, (still free to DreamSpark students,) you can now submit apps and games through your dashboard for both WinP Marketplace and Xbox LIVE Marketplace.
App Hub is open, but the app submission process for WinP7 developers isn't yet self-serve. We remain on track to enable all registered developers to submit their apps through App Hub in Nov. Thousands of first-mover developers who signed up for the early submission process are submitting apps and games via App Hub today. Some of these apps and games are already published in the pre-launch WPM.
More Info: Get started with App Hub