But you are making it sound like only the 3GS can do MMS in your original post.
Then you spin it to talk about the date.
Bottom line:
3GS Has these things that the iPhone 3G does not:
1) "Twice as fast by magic" whatever the $%^&YU* that means.
2) Video Recording
3) Compass
4) Voice Commands
5) 1 more MP on the Camera and Auto Focus
6) Slightly better Battery Life
That's it.
Those are the only 6 advantages to getting the new phone.
1.The "twice as fast" thing is probably bogus. If it is faster, it won't be that noticeable.
2. You can just jailbreak and get Cycorder. I haven't personally used it, so I don't know if you can do video editing (what is the need for that anyways), and I don't know if there will be a way to send it in a MMS, but it at least records video.
3. Ooh wow, a compass? We totally will miss that.
4. Voice commands? Somebody will probably come up with a jailbreak app for it if they haven't yet.
5. No big deal.
6. This and 8GB more are like the only changes to the new iPhone.
Maybe it's just me and my enjoyment of saving money, but the 3GS doesn't seem worth it.