I have had every iPhone model since the original. Apple listed the camera model in the EXIF tags as Apple iPhone until the 3GS where they actually said Apple iPhone 3GS. With the iPhone 4, Apple has gone back to simply listing Apple iPhone. This makes it tricky to make a smart album for only iPhone 4 photos. Since the new iPhone 4 has a flash, we can use that metadata to create our iPhone 4 Smart Album. In iPhoto go to File » New Smart Album... and enter the follow settings in the dialog box.
- Match all of the following conditions:
- Camera Model is Apple iPhone
- Flash is not Unknown
[crarko adds: I haven't tested this one.]

