According to the official PSP blog software update v4 will include a Google Internet search directly on the XMB (XrossMediaBar) interface. This new upgrade replicates the Google Internet search experience, delivering the same search results that you’d get at Google. And with a search history recall of 20 items, Web searches couldn’t be easier. After you download and install the firmware on your PSP, click on the XMB’s Network icon and then the new Internet Search icon. Enter your keywords and then let Google’s algorithms do the work. You’ll need to be connected to the Internet via a wireless access point or Wi-Fi hotspot. Googling something on the go has never been more convenient on your PSP.
Another new feature delivered through the 4.00 update is the ability to change viewing speed during playback of videos stored on your Memory Stick PRO Duo, so you can speed through or slow down what you’re watching. To do this simply press the up or down directional buttons while playing a video.