I spotted this news on several sites like Engadget etc and thought the price was too high (at $35) so i went to Success HK and its on sale for USD 24.77
Product Features
Charge your PSP by solar energy
Double solar boards for charging
It can charge the PSP/NDS if you have matched cable
Dimensio: 84 x 82 x 22 (L x W x H)mm
Inner lithium battery is 1800mAh
More Description
There is a LED in the left of this charger. When the board is irradiated by the sunlight, the LED will be green. It indicates that the sun energy is turning into electric energy. When you use the PSP AC Adaptor to charge the inner lithium battery, the LED will be red. When the battery is fully charged, the LED will be off.