I'm a Linux user, not OSX, but this sounds like it may work the same way. Usually, the "raw" disk devices (/dev/rdisk#) are not writable by ordinary users, only by the administrator. In OSX, I believe you run a command as administrator by prefixing it with "sudo." So, in this case, your command would be:
sudo dd if=nookhoney04.img of=/dev/rdisk# bs=1m
You'll be prompted for a password -- this will be your ordinary user password you use to log in.
Try this and see if it helps.
Tony
sudo stands for "Super-User Do," in case you're curious.
No, sudo isn't required to write to a flash memory card in OS X. When the card is inserted, it is owned by the user, not root. I thought Linux was the same, but haven't actually checked.
Bob