Someguys "sMMS" <----if you are on Sprint
http://67.228.199.237/forum.ppcgeeks...ad.php?t=22509
will also work with Wifi and is a very simple MMS program and a must have if you are on Sprint, I have sent friends MMS with wifi so i know it works, Sprint has a $5.00 PictureMail Service but at .03kb it can add up but I dont know if using wifi to will also charge you for accessing Picmail, to me it would be "No" if you are using Wifi instead of Vision..but you better ask a sprint rep on that. So if you dont get charge...all it will be is $5.00 with Wifi access to access picmail.
http://pictures.sprintpcs.com/options.do
You will still need Picmail Service to use "sMMS" cause you need to enter your "PhoneNumber and Password" to your Picmail account.