The Sony X walkman is now available to pre-order at, for 216 GBP - the 16GB version. The 32GB version will cost 283GBP.

Sony OLED WalkmanSony NWZ X1000 Walkman

There's no actual release date, but it says the players will be shipped after 2-5 weeks (but it might be just a default setting).

Merck - Advancing Display, Advancing LifeMerck - Advancing Display, Advancing Life