the jtag port does provide a potential back door to hack the **firmware, bd-drive, and ect. my guess, would be that the first hack will only work for fat PS3 consoles since sony appears to update their consoles before any discoveries are found by hackers.
the 360 hack pattern could possibly be applied as well to the PS3 bd-drive but i'm hoping that our fellow hackers can infiltrate the PS3 deeper than just the bd-drive firmware alone.
i do say that this update is good news.
PS1/SCPH-7501 | MM3 modchip
PS2 v9 | 250GB hdd | PS3 component cable | katana 32mb mc
PS3/CECH-2001B | 250GB hdd | 3.65 ofw