At IFA in Berlin Sony announced a number of new devices one being the Sony Walkman Mobile Entertainment Player. The device is still being developed but will be worth examining when its finally released.
The device features a 4.3 inch Touchscreen and runs on Android 2.3 (Gingerbread). It will be DNLA compliant allowing you to stream music to your other DNLA devices, obviously Sony hoping you'll have a Bravia to transfer it to!
If you prefer to connect with wires it will also have an HDMI out for high definition presumably for content such as games and video. It will also have the usual bluetooth connectivity and I expect it to have support for Sony's Qriocity music and movie streaming service.
It is also rumoured to have a camera. As it runs on Android the support for the games and presumably the apps will also be available.
Sony I guess will think of a more exciting tag for this Entertainment player than the one it currently has, we shall have to wait and see. There are no details of price or release dates at the moment as it is still in prototype mode. Reports from tech sites such as CNET who have been able to handle the prototype seem to be fairly upbeat.