The iPhone has only just recently had MMS functionality added. There are a number of threads on here about (the lack of) MMS on the N900.

I'm not trying to provoke an argument or flame war, but I'm genuinely curious to know how many people have MMS on the 'must have' side of the spec comparison sheet?

For me personally, it's totally irrelevant. I think I've sent 2 MMS messages since I got my first contract handset, a Nokia 7110, and one of those was just a 'see if it actually works' test message.

So, enlighten me. Is there something that makes MMS the killer app for you, as opposed to just using your N900/iPhone/Android device to send a regular e-mail or text message?