Just as a note, I recently recieved a phone for Cingular. I got the Nokia 6620 (Bluetooth, $47/month after taxes, $20 extra for excel)
Deal was $250 up front and $300 in rebates. $50 instant mail in rebate and $250 customer loyalty mail-in rebates after 180days of service. This was from Mobilemedia.com
. They've got reviews on most, if not all of the current phones on the market. And applicable discounts not offered though branded services. Maybe this'll help you out for cost conscious decisions.