You meant Jailbreak, unlocking is for changing carriers.
I Jailbroke my kids ipod touch 3 days ago.
Those directions didn't work for me tho(Those directions work fine for the iphone)....I used "Quick Freedom" to Jail break the ipod touch 2g with the 2.2.1 firmware with the "A" on the end.
Step 6
QuickPwn will check to verify that the ipsw file is valid. After completetion of the verification, click the blue arrow button to proceed.
It would not get past this step.