75w ago - Following up on the
previous article and
update for the 3.73 JailBreak, today Sony PlayStation 3 Hacker
KaKaRoToKS has confirmed it is safe to update to
PS3 Firmware 4.00 for those planning to use the
exploit when it is released.
Below are some recent Tweets from him, as follows:
FYI, tested yesterday and the jailbreak still works on 4.0

so it's safe to upgrade (for those on 3.73)
Just got my progskeet today. Thanks
uf6667 for sending it!

It's so small!
Not much new to go on at the moment, but keep in mind the upcoming PlayStation 3 exploit will not enable PS3 backup managers such as multiMAN or Rogero as it does not include support for modifying Peek and Poke for lv1 and lv2 as outlined in the
FAQ that was previously posted.
Considering your statements you won't have to get any keys and thus it's still possible to run homebrew/backups on PS3 FW >3.55 by bypassing any key requirements with "devtools".
Look like that nobody read the my post about a possible 4.0 alternative... also this is more a leave the scene and check somewhere else.
I'm packing my 3.55 in a corner, buying a new one soon, you never know. I'm not hoping anymore, it was obvious seeing the inertia of the scene that nothing was gonna happen for some time.
Maybe in a few years when PS4 will be here someone will find another way in.