Just used the Ubuntu "usb-creator-gtk" utility to make a bootable amd64 Ubuntu 11.10 USB drive. After I finished, there was a "test disk" button. I thought it'd verify the disk. Instead it launches a working QEMU and boots the bloody thing in a subwindow, which I'm currently posting to LiveJournal under Firefox out of.
That is actually impressive work by the team involved.
...of course because LiveJournal is awesome it marked the timestamp of the QEMU post in the future and made my journal partially dain-bramaged.