They will add a few of the features, namely mp3 support, that were mysteriously taken out of the device immediately before launch.
More details inside.

Sony presented o­n the 26th that they will offer upgrades free of charge to the hybrid recorder "PSX" at the beginning of February.

Updates will be done via a network connection to the unit, or a CD-ROM that will be distributed free of charge. They will announce more details about the update method o­n February 5th; and CD-ROM sending/receiving information, and shipment will begin in the latter part of February.

Also, beginning at 9AM o­n February 5th, the "PSX Upgrade Exclusive Desk" will begin operation, for CD-ROM shipment via phone, and other questions.

"PSX Upgrade Exclusive Desk:" 0120-252-645

Back in November, Sony officially presented that there were a few issues regarding compatibility with the PSX - and had to reduce the DVD-R dubbing speed from 24x to 12x, and a few other things. This update addresses a few of those issues, in addition to adding some new functions, ironing out bugs, etc..

The definite updates are:

-Dubbing from HD to DVD is now a maximum 24x
-TIFF image support
-MP3 audio support
-re-extend settings during extended recording
-Flash function (instant FF/RW to 15 second intervals from current time during playback)
-Video title sort function
-Title input via USB keyboard
-other fixes, such as dubbing to other units..

These updates are planned for March:
-DVD+RW recording support
-Support for GIF still images
-Rec/Playback of Cybershot format movies
-"Playstation BB" support

Inspired by:
http://www.watch.impress.co.jp/av/docs/20040126/sony.htm

News Release:
http://www.sony.jp/CorporateCruise/Press/200401/04-0126/