The rumor is they are showing it off at MWC, which starts Feb 25th. I would guess that until around that time is when we will see builds, or be able to build our own.
Sorry to double post, but just bumping this since it did officially get released. The official builds are for the GSM versions, but there are toro builds out there as well. It probably isn't really a daily driver at this point, but if you are interested.