SONY has just released a new version of the PSP firmware, adding quite a few nice new features.
The newly added custom themes function brings more personalization to the PSP. You can set your preferred PSP theme through the "Theme Settings" menu.
The video playback function has been further improved with the addition of a search function, and you can also set up a playlist for continuous playback. Other enhancements to media functions include the ability to play music while browsing pictures, and assigning button settings for Remote Play.
This update is pretty good, but so far, only the Japanese website has released the update, which is working fine. If you want to wait for the English version to be released, it will also be coming soon.