Here is how you do the actual jailbreaking of your iPod Touch:
Sync your iPod Touch, so that you have a backup of your data.
Open two folders:
1. Your Desktop
2. a. (In Vista/7) C:\Users\*Username*\AppData\Roaming\Apple Computer\iTunes\iPod Software Updates
b. (In XP) C:\Documents and Settings\*Username*\Application Data\Apple Computer\iTunes\iPod Software Updates
Move the file called "sn0wbreeze_iPod Touch 4-4.3.3.ipsw" from the Desktop to the folder called "iPod Software Updates".
Open iTunes, and navigate to the iPod Touch listed under the Devices section. then click on "Restore" to Restore your iPod Touch. Restore to the most recent backup of your iPod Touch.
After you restore your iPod Touch, sync it.