The BlackBerry 10 Dev Alpha has been updated to OS 10.0.6.670 today! At this time there is no change log available so, if you see something new feel free to let us know in the comments and we will update this article accordingly.
To install the update plug your Dev Alpha in to yoour PC and open Blackberry Desktop Software you should be hit with an update prompt. More info on updating the BlackBerry 10 Dev Alpha can be hound here: BlackBerry Dev Alpha
Thanks @fortneyland95 for giving us the heads up!