While I applaud the move it seems like a bad idea to throw open your SDK to thousands of developers months before they can actually submit applications.
It's likely thousands of applications will be submitted in a short time frame leading either to huge waits before apps are released (and fixes for those apps are released), or "bad press" apps such as Baby Shaker sneaking through.
It's likely thousands of applications will be submitted in a short time frame leading either to huge waits before apps are released (and fixes for those apps are released), or "bad press" apps such as Baby Shaker sneaking through.