Boot Gentoo Cell LiveCD from USB Media
"The following documentation describes how to boot an existing LiveCD from your USB media such as a USB hard drive or memory stick [onto a Cell based system like the Sony Playstation3 or IBM Cell Blades]. The advantages of this are that you skip burning the ISO image to CD and theoretically it should be faster.
Prerequisites
* Greater than or equal version of the beta2 LiveCD for PS3
* USB media that is formatted as ext2 or ext3."