Since Sony nuggets are in, here's mine: the Sony NWD-B105F MP3 Walkman. It was one of the first "Drag & Drop" MP3s Sony released. Got it late 2008, and it still works
Sony's new Walkmen have Bluetooth, noise cancelling, 16GB | TechCrunch
Amazon.com: Sony NWZE463BLUE Walkman MP3 Player : Everything Else
Sony NWZ-B130F series of Walkman MP3 Player Launched in India - TechGadgets