Hello george708,
And welcome to Apple Discussions!
One option is to hook the iPod up to the computer and iTunes library you normally sync it with. Upon disconnection, it will be unlocked. From there, make sure you disable or the password lock feature or change the passcode.
If that doesn't work, your only other option is to
restore the iPod via iTunes.
http://support.apple.com/kb/ht1339
B-rock