There are several things included in the iPhone 3.0 MMS release that users may not be aware of until they start flexing the application. The key here is that you can send much more than photos. Information from your Contacts can be sent via MMS by touching the Share Contact button when viewing entry details.
Similarly, touching the share button in Voice Memos will give the option to send via MMS or email. The iPhone 3GS will send video using MMS, although it will severely degrade the size and quality. This helps to insure the video will play on smaller and older phones.