Some of you probably know this already, but there is a workaround until someone works out what fixes need to happen to the MMS program.
1. You should be able to receive picture mail still (through the MMS hack... at least I can)
2. To send picture mail, simply e-mail the picture as an attachment to the following address:
10digitnumber@pm.sprint.com
(where "10digitnumber" is the phone number of the party you are sending to)
The receiving party will receive it as a picture mail.