According to the Facebook page below, Kmeaw PS3 3.60 CFW is in development.
To quote: Kmeaw Custom Firmware
Ouch! Sony is shut down. They making a new Server from scratch. So everyone will be seeing the message. every one the owns a ps3 will being seeing this message. They would be adding more security and safety measures. So enjoy the Offline. Kmeaw PS3 CFW