"cd2usb by hacktolive" (formerly "ULUMFW") is a windows program, designed to make Live USBs of Ubuntu (also works with Super Ubuntu). Credits to pendrivelinux.com for the Inspiration for this tool and original basic design!
Features
Optional persistence (from 128 MB to 4 GB) (only Ubuntu 8.10+)
Can use an Ubuntu CD or an ISO (or automatically download one)
Requires only 800 MB of free space on the USB flash drive
Does not format the device
Installs bootloader into device