AnythingButiPod has a comprehensive review of the 4GB iRiver Spinn. Spinn has more features than the iPod Nano. As a reminder, the player sports a 3.3-inch AMOLED with touchscreen 480×272 resolution and haptic feedback function. It can play most of famous audio and video file formats. The iRiver Spinn also provides 24 hours audio playback, an FM radio, flash game, Bluetooth 2.0, photo, text viewer, voice recording T-DMB, and video at 30 frames per second.
Comments from engadget : “The software is all nice and responsive, though it takes a bit of getting used to the d-click interface, and while you’re certainly not going to get much mileage out of the built-in speaker, it is a nice touch. The screen is great straight on, but suffers from some viewing angle woes. We really can’t fault the player for much, but there’s nothing too compelling here to make us leave any members of our current assortment of DAPs.”