Have ever wanted to add certain words to your iPhone’s dictionary, but can’t? Well, in iPhone OS 4.0 you will be able to add words to your iPhone’s dictionary. This feature is located under the “Keybaord” setting in the Settings app and will allow you to add any word of your choice into the iPhone’s dictionary. iPhone OS 4.0 is expected to be released next month at the WWDC along side with the new iPhone and iPod Touch.