I wanted to quick share this with everyone. I found it worked over using Disk Utility to restore a
.dmg disk image to a USB thumb drive.
sudo /usr/sbin/asr --noverify --erase --source source --target target
Or for example:
sudo /usr/sbin/asr --noverify --erase --source /Users/Shared/yosemite.dmg --target /Volumes/Untitled
You might also find this useful to ensure it's a bootable drive as well:
sudo bless --mount /Volumes/TheVolume --setBoot