ok this will be diff for everyone.
first i sent a picture message to my email. i put into my wii who it was FROM (my phone) (firstname.lastname@example.org)
then the wii sent a confirmation mesasge to my phone. i replied w. and now i can send photos to my wii. this would really have come in handy yesterday ;)
also sending a text messge to your email (to use with this) may not work because in my case i have a seperate phone email (email@example.com firstname.lastname@example.org) for pictures and text messages.