The firmware was released on GitHub but not yet pushed to the cloud systems, near as I can tell. That means: no OTA update to 0.4.9 (with the public cloud), and no compiling in the cloud for 0.4.9, until they get everything up and running. @mdma had mentioned in another thread that they will post up a notice (presumably in the forum) when that is complete.
See here: Particle Firmware Updates: Comments