PS4 Firmware v2.50 [Megathread] - Keep it all in this thread, please. It will be updated over the next few days to cover all the ins and outs of the update. :
PS4 Firmware 5.56 - Wololo.net
PS4 hack: The latest status for 5.50, 5.05 (and below) - updates from Qwertyoruiop - Wololo.net
Ps4 Firmware Update Will Add Requested Features Remove – Otosection
Sony taking beta sign-ups for PS4's next major firmware update - Polygon