PoBoy
Juggernaut
Came across a nice article on formatting SD cards and USB flash drives. Worth reading.
http://wiki.laptop.org/go/How_to_Damage_a_FLASH_Storage_Device
http://wiki.laptop.org/go/How_to_Damage_a_FLASH_Storage_Device
Better yet, try to avoid reformatting FLASH-based devices when you have the choice.