There aren't too many current color Palm OS smartphones out there- esp with expansion slots and MP3 players built-in. Some other phones offered by a mobile carrier may be color and have basic organizer functions but they don't have the expandability and power of Palm OS or Pocket PC.
You could add the $99 Veo SD card VGA camera to the 7135. Alternatively you could check out the Samsung i700 offered by Verizon. It's a Pocket PC Phone Edition PDA (also very powerful) and has a camera and the pocket version of Windows Media Player. We're hoping to get one in for review soon, but they only just came out.