Cowon's D3 is an Android (v2.1) running PMP with a 3.7" AMOLED display, Full-HD (1080p) support, Wi-Fi, HDMI out, Bluetooth and a T-DMB TV tuner. It's got 8/16/32GB of onboard storage and a microSD slot. It's got some applications (such as twitter and social networking) but apparently it can't run 3rd party Android apps.
The Walkman NW-A850 series is an update to the NW-A840 series. The players have a 2.8" 240x400 OLED display (seems to be the same one as in the A840). The NW-A855 has 16GB, the A856 has 32GB and the A857 has 64GB.
They will be released in November 2010 in Japan. The A855 (16GB) will cost $280.
The IceTouch is the world's first product with a Transparent OLED display. This media player includes 8/16GB of memory, has a strong CPU and Samsung's TouchWiz Sweep interface. It has 5.1-channel sound enhancement technology and it continually analyzes and adjusts audio levels to reflect the producer’s intended sound. Here's a nice video of the player.
The AMOLED screen casing is constructed using a dual-injection molding process and tempered glass and results in a smooth, durable and scratch-proof surface. The player is white, but can be customized using separately sold color skins.
It'll be available in the first half of 2010, and will cost around $330.
The P3 is a media player with a large touch OLED. It has a dual-boot system with Windows CE (6.0) and Android. It is capable of supporting 1280 x 720p HD video playback, running on a 800Mhz ARM processor. It also has Wi-Fi, microSD slot, mobile TV support and comes with 8/16/32GB of internal memory.
The NW-A840 is a thin Walkman at only 7.2mm, and available in 16Gb, 32Gb and 64Gb. It has a TV-out with 720x480 resolution, S-Master digital amplifier, FM radio and noise canceling. It does not have a touch screen or WiFi. Sony says that the battery life will be 29 hours for audio and 9 for video (at 384kbps MPEG-4).