I locked an 80GB HDD using hdlock, when i was locking I made a typo. Is there anyway I can unlock this without the code?

The whole point of the secutity system is to make it so you can't unlock it without the code. Depending on the brand of hard drive, the manufacturer may have a program that will allow you to completely wipe out the hard drive and unlock it, but you won't be able to recover any data.

Maybe you can figure out what your typo was?

well thanks... do you think Western Digital Does

WRONG! hdlock creates a text file on the boot disk when you lock a drive that contains the code you used to lock the last drive. It disappears when you lock another drive, because it gets overwritten, but until then, it stays there.