Do not update iOS 4.0.2 to your iPhone or iPod touch until new Jailbreak Device is obtainable

Apple has newly released his firmware iOS 4.0.2 for iPhone 3G, iPhone 3GS, iPhone 4, iPod touch 2G and iPod 3G. The new firmware comes with only security fix PDF exploit used by JailbreakMe device, but not with new features. So in case you think you ought to be conscious about your security, then you may go ahead and update your iDevices such as your iPhone 3G, iPhone 3GS, iPhone 4, iPod touch 2G and iPod 3G and stay unjailbreakable until a new jailbreak device is obtainable.

Well, you are advisable, not to update your iPhone or iPod touch with the new firmware iOS 4.0.2 until they get back to you with jailbreak guide or jailbreak device. Till then have patience.