I figured that as much. Thinking back to the message that I referred to in my original post, I now recall having to open the file to view it. I don't do a lot of work with mobile phones, but I was aware that Flash doesn't work on iOS. Maybe this is something I should read into further - any good books you guys can recommend?
So basically, I should make a compatible file and send it as MMS? Cool. I'll look into that. Thanks for getting me started on the right track. If anyone can recommend any good books or articles, I'd really appreciate it.