PSP 3.70 firmware released
Works on fat and slim ones.
Updated on
PlayStation Portable firmware has been updated to version 3.70 in Japan, with US and European updates sure to follow soon.
Version 3.70 which works on the new PSP Slim & Lite as well as the old one, although some features are specific to one or other model.
New features include the ability to set custom themes, while videos can now be searched through and played sequentially. You can also listen to music while browsing photos now.
For more information, you can glance down the changelog page on Sony's Japanese site, or check through PSP Updates' assessment.
If you must have these things through the official source, keep an eye on the UK and US update sites or do a system update from the PSP menus.