Windows Phone App Hub updated to allow beta releases
On top of those improvements, Microsoft added a new app submission screen with an option for distributing beta apps. A beta Marketplace has been rumored for WP7, and it looks like it's finally coming to pass. Early reports say the beta Marketplace may not require certification, or may just have lower certification standards. Beta apps will be private and only accessible through Zune links, which means it seems likely that the WP7 Web Marketplace may be coming sooner rather than later.
This seems like a win all around. Devs get better early feedback in order to make better apps. And, those of us obsessed with being the first to try new things will now have official channels to get at WP7 app betas.