Sony has released a System Patch for the NX series. This fixes low battery issues with the Communications Card and improves Communications Card recognition. It also improves ATRAC3 sound quality and more.
The Sony NZ90 will be available in the UK in mid-March, according to ZDnet UK. What it will cost there is not yet known.
PowerRUN 1.2 has been released by developer Tatsushi Yamada, perhaps better known as Hacker Dude-san. This utility allows applications to run from external memory cards. The new version is Palm OS 5 compatible and allows Sony NX Series users to run the very large NetFront web browser from a Memory Stick. It is $15.