Unetbootin: Bootable Lunux on a USB Stick

Used Unetbootin to create a bootable USB flash drive of Jolicloud, a cloud-based version of Ubuntu. Jolicloud has its own USB creator app, but on Jolicloud 1.1 that version stops with the message "No drive selected". Unetbootin works well enough, but even that took me three tries. I was writing over a Ubuntu 8.10 install on the flash drive. What finally worked was using fdisk to remove the existing partition (vfat) and create an ext3 partition, followed by mkfs.ext3 /dev/sdb1 in this case.
See the docs at:
http://unetbootin.sourceforge.net/