I became spoiled from my old LG Env that would announce who is calling prior to playing the ring tone. I would love something like that for the Blackberry. I did some searching and couldn't find anything. Here is an example of what happens...
The phone would voice...
"Call from Jane Doe" if you have the contact in your contacts, otherwise it would say the number. "Call from 555-555-5555." Then would play your ring tone.