Twitter is buzzing like crazy. AX 2012 has been released.
I've not been able to find partner and customer licenses yet, so I guess they're still setting up VOICE with the licensing, but partners can already download the product installer image here.
Make sure to check out the public launch page, and the PartnerSource launch page with all sorts of links to documentation, training, etc.
Check out my June blog post with a Documentation roundup and links to what's available. There are a few new things released since then, which you can find if you search the Microsoft Download Center.