Owen Stampflee Linux Product Manager for Fixstars Corporation made the following post in the yellowdog-boards(YellowDog Linux forums).
"Everyone,
I've caught a rumor from a reputable source that the next firmware update for old PS3s will remove the OtherOS feature...
I'm not sure if it's true or not but it's in the best interest of the YDL community to spread the word.
Cheers,
Owen"
It can be speculated that this is sony's answer to geohots exploit which utilizes the other os feature.
http://n4g.com/gaming/News-478833.aspx