[ Thanks to DDahl for this link.
]
“The next system software update for the PlayStation 3
(PS3) system will be released on April 1, 2010 (JST), and will
disable the “Install Other OS” feature that was available on the
PS3 systems prior to the current slimmer models, launched in
September 2009. This feature enabled users to install an operating
system, but due to security concerns, Sony Computer Entertainment
will remove the functionality through the 3.21 system software
update.“In addition, disabling the “Other OS” feature will help ensure
that PS3 owners will continue to have access to the broad range of
gaming and entertainment content from SCE and its content partners
on a more secure system. ‘”