Hi
http://blogs.pcworld.com/staffblog/archives/006954.html
"
Fedora 9 adds key new features to the Linux OS including the addition of
the KDE 4 desktop environment that defines the look and feel of this OS.
Another key feature added is the ability to run the Fedora 9 OS from a
USB drive. You can not only boot the OS from a USB drive, but can also
add applications and store data to the drive (a true portable OS)."
Rahul