Development

Anyone out there had any experience getting a response from carriers about commercial use of the mobile email gateway to send multimedia to mobile phones. If you want to send a video to a phone it is clearly possible, but there doesn't seem to be a way to do it through the shortcode process (unless you want to wait for premium MMS).
I find it hard to get anyone on the phone at a carrier and I haven't yet found any useful info on any of the development forums.

Info? Thoughts? Comments?