My SSD Drive has been converted to a Core Storage drive and cannot be erased/reformatted?
You can blow away a corestorage disk partition by booting in Single User Mode...  then use this command:

WARNING: THIS WILL RUIN ALL DATA ON THE DISK!

dd if=/dev/zero of=/dev/disk0


After a moment you will see an error that the corestorage volume has come offline unexpectedly (that is because you have destroyed it).  You can now type Ctrl+. to stop ruining the disk.

Then you can boot in Recovery mode (hold down Ctrl+R upon boot) and proceed to format this disk.