*UPDATE* – It looks like RIM is rolling out OS version 10.0.6.386 now.
Developers! At last, RIM has finally pushed out an update to the BlackBerry 10 Dev Alpha. The new update brings it to OS version 10.0.6.361. In order to update to the latest OS, you will have to connect to a computer and use the latest BlackBerry Desktop Manager (7.1). After that, follow the rest of the instructions.