For those of us that still have issues I wandered over to the Sprint Users - Sprint PCS Forum, Downloads and Tools
site to see if there was anything there. I am currently on enternal hold to hopefully get this resolved. It seems from looking over there that this SERO thing may present some issues. For what it is worth you may be on that plan if you ordered your phone over the Internet as I did without knowing it.
There is also one individual who had to have a seperate "PAM" code with the Blackberry plan initiated. He was told that the BB had three seperate parts, the phone, the data, and there was a need for a PAM code.