My desktop doesn't have floppy drive (and I think most of the people don't have too).
But my desktop BIOS has update, how to update it without using floppy?
We can use GRUB to load the disk image into ram disk to run the BIOS update. Method is:
http://www.thinkwiki.org/wiki/BIOS_Upgrade#Updating_via_Grub_and_a_Floppy_Image
Bascially GRUB will assign a ram disk and fill with the image file, and then boot using that as if it is a floppy disk.
