I gave a presentation within the Engineering school on Friday that gave a brief look at the iPhone platform and Objective-C. The end of the presentation was a quick tutorial in Interface Builder and XCode. You can download the presentation and the tutorial project here:
iPhone Development Tutorial
iPhoneDevelopmentTutorial.zip

If you have any questions, feel free to email me at bengotow@gmail.com or post a comment. Also, be sure to check out layersforiphone.com.