The next PS3 Firmware update which is expected on April 1 brings a surprise for the older PS3 owners, as the update v3.21 will disable the "Install Other OS" feature. For those enjoying the Linux distros on their PS3 machines will be no longer be allowed to install the other operating systems beginning April 1st, however you can choose not to install the system update but then you won't be able to use the PSN or play blu-rays that requires latest firmware.

More details of the new PS3 System Software update v3.21 can be found here once it becomes available.

via Playstation blog