I’m pretty sure I just said that: “and it’ll come across as an MMS message to the recipient (if their phone supports it obviously).”
If someone is sending a photo to an iPhone from a Razr or something, then instead of sending the message to a cell phone number, they can send it to a regular email address like Gmail, which can then be checked on the iPhone Mail application. But to send an MMS from the iPhone to the Razr, you can use one of the email addresses above.
Yes, I do have an iPhone, do either of you?