SWEET! That seemed to do the trick. I hadn't changed any of those settings prior to that, stock they came as:
Server Name: Alltel MMS
Gateway: mms.alltel.com
Port Number: 8080
Server Address:
http://mms.alltel.com/servlets/mms
Connect Via: Alltel Wireless
(there wasn't a WAP option... found that odd)
but thanks! your settings worked like a charm!!!