Looks like Microsoft has wisened up, listened to the masses, and lifted the NDA on the Shadowrun Beta.  I definitely have some motivation to play it some more and share my thoughts.
Been enjoying the Shadowrun beta? Great. Now share the news! We’re lifting the NDA on coverage for and around the beta as of today. [...]

So, looks like the Shadowrun Beta has expanded its size, recently sending out redemption codes to thousands of gamers.
I gots myself a code and have downloaded the Beta.  I will give it a whirl soon enough, although they are pretty strict about what you can and cannot say about the Beta.
When [...]