Sony today released version 2.50 of the Sony PlayStation Portable firmware.
[LocationFree Player] has been added as a feature under [Network].
[Auto-Select] and [Unicode (UTF-8)] have been added as options to [Encoding] under [View] in the [Internet Browser] menu bar.
Settings for [Text Size] and [Display Mode] in [Internet Browser] can now be saved.
The input history of online forms accessed through [Internet Browser] can now be saved.
Copyright-protected video can now be played under [Video].
(This applies to video saved on Memory Stick Duo media).
For details, contact the video content provider.
Note that fees may be charged to obtain or use copyright-protected video.
Downloadable copyright-protected video may not be available in all countries
[Set via Internet] has been added as an option to [Date and Time] in [Date & Time Settings] under [Settings].
[WPA-PSK (AES)] has been added as a security method under [Network Settings].
You can download the firmware here. I believe it also fixes a flaw which enabled users to downgrade to an earlier firmware to run homebrew code.