Hello, as expected, the Chronic Dev Team and the iPhone Dev Team have released the A4 untethered for 5.0.1 based on my research.
It is exactly the same set of files, either distributed as a Cydia package for those that are already tethered or a redsn0w bundle for new users.
They both did a great job testing and integrating the payload.
Here is a link to their respective blog posts :
- Chronic Dev Team : http://greenpois0n.com/?p=150
- iPhone Dev Team : http://blog.iphone-dev.org
- temporary redsn0w download links: http://pastie.org/3078869