I refer people to this thread.
HowardForums: Your Mobile Phone Community & Resource - The Official NEW Blackberry Data Plans Thread
I have the new $30 plan, added to an ACII voice plan.
1. This plan will NOT work with BES. BIS only.
2. You do NOT need to have the new voice plan.
3. You do NOT need to have a 8130 Pearl, any Blackberry will do.
4. The feature code which you can use to "inform" the CSR can be found in the thread above.
-Adam