If you want to get the new firmware from Apple for your iPhone/iPad/iPod nows your chance.
The new firmware has been cracked, 6 months in the making.
Here are the instructions:
1) Make a note of your apps as they maybe lost.
2) Update your device to the latest firmware in iTunes (currently 4.1)
3) Go to google and type the follwoing in the seach bar: limera1n
4) run limera1n and follow the instructions it give s on the screen
5) You will get a prompt to turn the phone on, DO THIS!!!
6) find Linera1n icon and press it
7) press the cydia icon in the screen that has opened. It will install cydia.
phon will re-boot
9) click on cydia icon and then entre http:cydia.hackulo.us in the sources section to install Installus
You will now have a jailbroken iPhone 4.1
This will alos work on the latest iPad and iPod!!!