This is one cool gadget I crave for! First time ever Sony makes a phone Walkman. Not just an MP3 player with robust battery life (15 hours with phone on, 30 hours with phone off), it is also a 2-megapixel camera, an FM reciever and a supporter of the Memory Stick Pro Duo the latest of the Memory Sticks. Has a built in 38-MB memory. Factory shipped with 512MB Memory Stick Pro Duo, but upgradeable to upto 2GB. A must have for every geek!.