The new Sony Walkman W810i is a great little candybar multimedia phone. It comes packed with MP3 player, 256 Mb pro duo card, 2 MP camera, and FM radio, among other things. This little phone also comes with some great reviews.

Reviews
Cnet
Phonescoop
GSM Arena

Resources
Cingular Support Site - Links, specs, etc
Sony Ericsson Official Site - Downloads, FAQ, Updates, Manuals

The Pantech C120 is another prepaid phone by Cingular. Though a very basic phone with a VGA camera and polyphonic ringtones, it is also a very slim and small phone.

Reviews
Cnet
Phonescoop

Resources
Cingular Support Site
Pantech Manuals/FAQs