This is what version 3.30 gives you:
- Support for displaying thumbnails for items has been added under [RSS Channel].
- Support for PLAYSTATION Network titles has been expanded.
- The size of videos that can be played under [Video] has been increased.
- Support for displaying thumbnails for content saved in the “VIDEO” folder of a Memory Stick has been added under [Video].
According to the Google translated Japanese Playstation page, the PSP can now play video in 720×480, 352×480, 480×272. PSPs native resolution is 480×272. It also seems that the guidelines for the browser and the RSS are updates.
I will update if the European/US gives more info on this update.