Sony has announced the UK pricing and release date for their OLED touchscreen equipped Walkman.
NWZ-X1050B.CE7 16GB £209 RRP
NWZ-X1060B.CE7 32GB £279 RRP
They will be available at selected retailers and Sony Style high street stores from 13 May 2009 (that's tomorrow!). Or, you can buy them from the web for a slight discount. Amazon UK is taking pre-orders for the X1050B for £199.99 and the X1060B for £249.99.
It isn't cheap (the weak sterling didn't help), but considering the technology (WiFi, OLED touchscreen, web browser, digital amp) and bundle (active noise cancelling in-ear headphones), it is still pretty competitive. In the mean time you can read my review of their S639F and S739F Walkmans.
Update for US residents. Amazon.com is now taking pre-orders on the X-Series Walkman. The US specific model numbers will be designated X1051 and X1061, and will feature the Slacker subscription-based personal radio app.