If your iPod touch IS NOT jailbroken and you have the 4.1 update, you're in luck: you can jail break your iPhone/iPod Touch at. http://greenpois0n.com
. All You have to do is click your operating system ( Window, Mac, or Linux) and click run. The program will tell you exactly waht to do.******** WARNING: Your Screen will go white and a bunch of code will show up its entirly normal******.
Now open the loader app and tap install cydia. once thats done, open cydia and have it reorganize.