I've been trying Fedora 15 (and Gnome 3) from a Live USB. I've had a Live CD since the beta but my CD is failing and read errors mean programs fail to launch even if the OS does load. I'd tried a USB installation a year or so ago when I was distro hopping, but without luck. This time the USB boot worked, with only a minor hitch.
I downloaded the Live image from Fedora,and copied it to my USB drive using these instructions. I then bumped up the USB drive in my BIOS boot options and let the computer reboot... to see this message:
isolinux.bin missing or corrupt
rest ehre