Sony's pushing out version 3.55 for the PlayStation 3
and from their blog page
, the only thing it's adding is that it adds a security patch. Really, this is another patch in a long cat and mouse game to combat the software that was recently updated to allow for jailbreaking pre-3.55. Now the ball is back in the jailbreaker's court so we'll see how long before they come out with software to bypass this, although they have said that it'll work no matter what now.