iOS 4.0.2 is now available in iTunes.

It takes away the ability to jailbreak your iPhone as easily as you were able to do with iOS 4.0.1.

iOS 4.0

iOS 4.0

The choice is yours.  If you are saving money with the jailbreak by tethering your iPad to your iPhone as we have shown you how to do, then you can stay at iOS 4.0.1.

If you are concerned about other nefarious developer crafting a fishing site that may lure you in to reading a trojan PDF file that gives them root access to your device, then you should update to iOS 4.0.2.