I thought about necro rising one of the old threads from rainless or myself about 3.21 removing OtherOS but necroing threads seems to irrationally irritate people. Here is the class action settlement (for up to $65) for you if you purchased a fat PS3 between November 1, 2006, and April 1, 2010 and used the OtherOS functionality.
http://www.otherossettlement.com/index
http://www.otherossettlement.com/index