The [Install Other OS] and [Default System] features have been deleted. If you update your system software to version 3.21 or later, you will not be able to use [Install Other OS] or [Default System] under(Settings) >
(System Settings).
Well, they released the firmware update today, an despite some speculation that it might be an April Fool's joke, the release notes do mention removing the Linux support for the PS3. Obviously, I should reconsider buying Sony products in the future, since I'm not down with them removing features from things I've already bought.
I'm debating if i should wait for the modders to crack the firmware and release a patched version of 3.21, or if I should give up and just upgrade, since haven't yet used the feature...