On the openSUSE 11.2 milestone (beta) release page there was a nice tip on how to quickly make a bootable install usb stick using the LiveCD's:

Note, if you need to try the live CD on a machine with no CD-ROM drive, you can copy it to a USB key with the following command:

dd if=image.iso of=/dev/sdX bs=4M

Replace “image.iso” with the name of the ISO image that you have downloaded, and replace “sdX” with the actual device name of your USB drive. Be careful! This will erase the target device, so make sure you have the correct device name and have any vital data backed up!

I'll be trying this on my new pet project : the Acer ASPIRE Revo 3600 Nettop :)