They just enrolled me in the demo two or three days ago. It's pretty slick (well, very slick), it's just that their libraries don't yet support it (I think the API is going to change). It was very easy to add to Checkout, though.

Yea they just totally revamped the beta, its pretty awesome. Bitcoin went from being a completely separate API to integrated with the standard charge APIs. It also got integrated into Stripe checkout.